When the Prophet ﷺ said, "Samiʿa l-lahu liman hamidah," (Allah heard those who sent praises to Him), he would say, "Rabbana wa laka l-hamd." On bowing and raising his head from it the Prophet ﷺ used to say Takbir. He also used to say Takbir on rising after the two prostrations. (See Hadith No. 656).  

كَانَ النَّبِيُّ ﷺ إِذَا قَالَ سَمِعَ اللَّهُ لِمَنْ حَمِدَهُ قَالَ اللَّهُمَّ رَبَّنَا وَلَكَ الْحَمْدُ وَكَانَ النَّبِيُّ ﷺ إِذَا رَكَعَ وَإِذَا رَفَعَ رَأْسَهُ يُكَبِّرُ وَإِذَا قَامَ مِنَ السَّجْدَتَيْنِ قَالَ اللَّهُ أَكْبَرُ  

The Messenger of Allah ﷺ said: The Imam is appointed, so that he should be followed, so don't be at variance with him. Recite takbir when he recites it; bow down when he bows down and when he says:" Allah listens to him who praises Him," say:" O Allah, our Lord, to Thee be the Praise." And when he (the Imam) prostrates, you should also prostrate, and when he says prayer sitting, you should all observe prayer sitting.  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ إِنَّمَا الإِمَامُ لِيُؤْتَمَّ بِهِ فَلاَ تَخْتَلِفُوا عَلَيْهِ فَإِذَا كَبَّرَ فَكَبِّرُوا وَإِذَا رَكَعَ فَارْكَعُوا وَإِذَا قَالَ سَمِعَ اللَّهُ لِمَنْ حَمِدَهُ فَقُولُوا اللَّهُمَّ رَبَّنَا لَكَ الْحَمْدُ وَإِذَا سَجَدَ فَاسْجُدُوا وَإِذَا صَلَّى جَالِسًا فَصَلُّوا جُلُوسًا أَجْمَعُونَ  

The Messenger of Allah ﷺ while teaching us (the principles of faith), said: Do not try to go ahead of the Imam, recite takbir when he recites it, and when he says: "Nor of those who err" you should say Amin, bow down when he bows down, and when he says: "Allah listens to him who praises Him" say: "O Allah, our Lord, to Thee be the praise".  

كَانَ رَسُولُ اللَّهِ ﷺ يُعَلِّمُنَا يَقُولُ لاَ تُبَادِرُوا الإِمَامَ إِذَا كَبَّرَ فَكَبِّرُوا وَإِذَا قَالَ وَلاَ الضَّالِّينَ فَقُولُوا آمِينَ وَإِذَا رَكَعَ فَارْكَعُوا وَإِذَا قَالَ سَمِعَ اللَّهُ لِمَنْ حَمِدَهُ فَقُولُوا اللَّهُمَّ رَبَّنَا لَكَ الْحَمْدُ  

"The Messenger of Allah ﷺ said: 'The Imam is appointed to be followed, so when he says the takbir, say the takbir, and when he recites, be silent, and when he says: "Sami' Allahu liman hamidah (Allah hears those who praise Him)," say: "Allahumma rabbana lakal-hamd (Our Lord, to You be praise)."  

قَالَ رَسُولُ اللَّهِ ﷺ إِنَّمَا جُعِلَ الإِمَامُ لِيُؤْتَمَّ بِهِ فَإِذَا كَبَّرَ فَكَبِّرُوا وَإِذَا قَرَأَ فَأَنْصِتُوا وَإِذَا قَالَ سَمِعَ اللَّهُ لِمَنْ حَمِدَهُ فَقُولُوا اللَّهُمَّ رَبَّنَا لَكَ الْحَمْدُ  

“The Messenger of Allah ﷺ said: ‘The Imam has been appointed to be followed, so when he says Allahu Akbar, then say Allahu Akbar, when he recites, then listen attentively; when he says: Not (the way) of those who earned Your anger, nor of those who went astray,[1:7] then say Amin; when he bows then bow; when he says Sami’ Allahu liman hamidah (Allah hears those who praise Him), then say Allahumma Rabbana wa lakal-hamd (O Allah, our Lord, to You is the praise);” when he prostrates then prostrate; and if he prays sitting down then all of you pray sitting down.’”  

قَالَ رَسُولُ اللَّهِ ﷺ إِنَّمَا جُعِلَ الإِمَامُ لِيُؤْتَمَّ بِهِ فَإِذَا كَبَّرَ فَكَبِّرُوا وَإِذَا قَرَأَ فَأَنْصِتُوا وَإِذَا قَالَ {غَيْرِ الْمَغْضُوبِ عَلَيْهِمْ وَلاَ الضَّالِّينَ} فَقُولُوا آمِينَ وَإِذَا رَكَعَ فَارْكَعُوا وَإِذَا قَالَ سَمِعَ اللَّهُ لِمَنْ حَمِدَهُ فَقُولُوا اللَّهُمَّ رَبَّنَا وَلَكَ الْحَمْدُ وَإِذَا سَجَدَ فَاسْجُدُوا وَإِذَا صَلَّى جَالِسًا فَصَلُّوا جُلُوسًا أَجْمَعِينَ  

“The Messenger of Allah ﷺ said: ‘The Imam has been appointed to be followed, so when he says Allahu Akbar, then say Allahu Akbar, when he recites, then listen attentively; when he says: Not (the way) of those who earned Your anger, nor of those who went astray,[1:7] then say Amin; when he bows then bow; when he says Sami’ Allahu liman hamidah (Allah hears those who praise Him), then say Allahumma Rabbana wa lakal-hamd (O Allah, our Lord, to You is the praise);” when he prostrates then prostrate; and if he prays sitting down then all of you pray sitting down.’” (Using translation from Ibn Mājah 846)   

أَنَّ رَسُولَ اللهِ ﷺ قَالَ إِنَّمَا الْإِمَامُ لِيُؤْتَمَّ بِهِ فَإِذَا كَبَّرَ فَكَبِّرُوا وَإِذَا قَرَأَ فَأَنْصِتُوا وَإِذَا قَالَ {وَلَا الضَّالِّينَ} [الفاتحة 7] فَقُولُوا آمِينَ وَإِذَا رَكَعَ فَارْكَعُوا وَإِذَا قَالَ سَمِعَ اللهُ لِمَنْ حَمِدَهُ فَقُولُوا رَبَّنَا وَلَكَ الْحَمْدُ وَإِذَا صَلَّى جَالِسًا فَصَلُّوا جُلُوسًا أَجْمَعُونَ  

“The Messenger of Allah ﷺ said: ‘The Imam has been appointed to be followed, so when he says Allahu Akbar, then say Allahu Akbar, when he recites, then listen attentively; when he says: Not (the way) of those who earned Your anger, nor of those who went astray,[1:7] then say Amin; when he bows then bow; when he says Sami’ Allahu liman hamidah (Allah hears those who praise Him), then say Allahumma Rabbana wa lakal-hamd (O Allah, our Lord, to You is the praise);” when he prostrates then prostrate; and if he prays sitting down then all of you pray sitting down.’” (Using translation from Ibn Mājah 846)   

قَالَ رَسُولُ اللهِ ﷺ إِنَّمَا الْإِمَامُ لِيُؤْتَمَّ بِهِ فَإِذَا كَبَّرَ فَكَبِّرُوا وَإِذَا رَكَعَ فَارْكَعُوا وَإِذَا قَالَ سَمِعَ اللهُ لِمَنْ حَمِدَهُ فَقُولُوا رَبَّنَا لَكَ الْحَمْدُ وَإِنْ صَلَّى جَالِسًا فَصَلُّوا جُلُوسًا أَجْمَعُونَ  

[Machine] From the Prophet ﷺ that he said: "Indeed, the Imam is meant to be followed, so when he says 'Allahu Akbar,' then all of you say 'Allahu Akbar.' And when he bows, then all of you bow. And when he says 'Sami'a Allahu liman hamidah,' then say 'Rabbana lakal hamd.' And when he prays sitting, then all of you pray sitting, all together."  

عَنِ النَّبِيِّ ﷺ أَنَّهُ قَالَ إِنَّمَا الْإِمَامُ لِيُؤْتَمَّ بِهِ فَإِذَا كَبَّرَ فَكَبِّرُوا وَإِذَا رَكَعَ فَارْكَعُوا وَإِذَا قَالَ سَمِعَ اللهُ لِمَنْ حَمِدَهُ فَقُولُوا رَبَّنَا لَكَ الْحَمْدُ فَإِذَا صَلَّى جَالِسًا فَصَلُّوا جُلُوسًا أَجْمَعِينَ  

[Machine] "I resemble you in performing the prayer similar to the Messenger of Allah ﷺ. The Messenger of Allah ﷺ, when he said, 'Allah hears whoever praises Him,' he would say, 'Our Lord, to You is all praise,' and he would say takbir (Allahu Akbar) when he performed the bowing, and when he raised his head, and when he stood up from the two prostrations."  

أَنَا أَشْبَهُكُمْ صَلَاةً بِرَسُولِ اللهِ ﷺ كَانَ رَسُولُ اللهِ ﷺ إِذَا قَالَ سَمِعَ اللهُ لِمَنْ حَمِدَهُ قَالَ رَبَّنَا وَلَكَ الْحَمْدُ وَكَانَ يُكَبِّرُ إِذَا رَكَعَ وَإِذَا رَفَعَ رَأْسَهُ وَإِذَا قَامَ مِنَ السَّجْدَتَيْنِ قَالَ اللهُ أَكْبَرُ  

The Prophet ﷺ said, "The Imam is to be followed. Say the Takbir when he says it; bow if he bows; if he says 'Samiʿa l-lahu liman hamidah', say, ' Rabbana wa laka l-hamd', prostrate if he prostrates and pray sitting altogether if he prays sitting." (Using translation from Bukhārī 734)  

وَقَالَ رَسُولُ اللهِ ﷺ إِنَّمَا جُعِلَ الْإِمَامُ لِيُؤْتَمَّ بِهِفَلَا تَخْتَلِفُوا عَلَيْهِ فَإِذَا كَبَّرَ فَكَبِّرُوا وَإِذَا رَكَعَ فَارْكَعُوا وَإِذَا قَالَ سَمِعَ اللهُ لِمَنْ حَمِدَهُ فَقُولُوا اللهُمَّ رَبَّنَا لَكَ الْحَمْدُ وَإِذَا سَجَدَ فَاسْجُدُوا وَإِذَا صَلَّى جَالِسًا فَصَلُّوا جُلُوسًا أَجْمَعُونَ  

"The Messenger of Allah ﷺ said: 'The Imam is appointed to be followed, so when he says the takbir, say the takbir, and when he recites, be silent, and when he says: "Sami' Allahu liman hamidah (Allah hears those who praise Him)," say: "Allahumma rabbana lakal-hamd (Our Lord, to You be praise)." (Using translation from Nasāʾī 921)   

قَالَ رَسُولُ اللَّهِ ﷺ إِذَا قَالَ الْإِمَامُ اللَّهُ أَكْبَرُ فَقُولُوا اللَّهُ أَكْبَرُ فَإِذَا قَالَ سَمِعَ اللَّهُ لِمَنْ حَمِدَهُ فَقُولُوا رَبَّنَا وَلَكَ الْحَمْدُ «»  

“The Messenger of Allah ﷺ said: ‘The Imam is appointed to be followed. When he says Allahu Akbar, then say Allahu Akbar; when he bows, then bow; when he says Sami’ Allahu liman hamidah, then say Rabbana wa lakal-hamd; when he prostrates then prostrate; if he prays standing, then pray standing, and if he prays sitting down then pray sitting down.” (Using translation from Ibn Mājah 1239)   

أَنَّ النَّبِيَّ ﷺ قَالَ «إِنَّمَا جُعِلَ الْإِمَامُ لِيُؤْتَمَّ بِهِ فَلَا تَخْتَلِفُوا عَلَيْهِ فَإِذَا كَبَّرَ فَكَبِّرُوا وَإِذَا رَكَعَ فَارْكَعُوا وَإِذَا قَالَ سَمِعَ اللَّهُ لِمَنْ حَمِدَهُ فَقُولُوا اللَّهُمَّ رَبَّنَا لَكَ الْحَمْدُ وَإِذَا صَلَّى قَاعِدًا فَصَلُّوا قُعُودًا أَجْمَعُونَ»  

The Imam is appointed to be followed. So recite takbir when he recites it, and bow down when he bows down and when he utters:" Allah listens to him who praises Him," say" O Allah, our Lord, for Thee be the praise." And when he prays, standing, you should pray standing. And when he prays sitting, all of you should pray sitting. (Using translation from Muslim 417)  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ «إِنَّمَا الْإِمَامُ لِيُؤْتَمَّ بِهِ فَإِذَا كَبَّرَ فَكَبِّرُوا وَإِذَا رَكَعَ فَارْكَعُوا وَإِذَا رَفَعَ فَارْفَعُوا وَإِذَا قَالَ سَمِعَ اللَّهُ لِمَنْ حَمِدَهُ فَقُولُوا اللَّهُمَّ رَبَّنَا لَكَ الْحَمْدُ وَإِذَا صَلَّى قَائِمًا فَصَلُّوا قِيَامًا وَإِذَا صَلَّى قَاعِدًا فَصَلُّوا قُعُودًا أَجْمَعُونَ»  

"The Messenger of Allah ﷺ said: 'The Imam is appointed to be followed, so when he says the takbir, say the takbir, and when he recites, be silent, and when he says: "Sami' Allahu liman hamidah (Allah hears those who praise Him)," say: "Allahumma rabbana lakal-hamd (Our Lord, to You be praise)." (Using translation from Nasāʾī 921)  

قَالَ رَسُولُ اللهِ ﷺ إِنَّمَا جُعِلَ الْإِمَامُ لِيُؤْتَمَّ بِهِ فَإِذَا كَبَّرَ فَكَبِّرُوا وَإِذَا قَرَأَ فَأَنْصِتُوا وَإِذَا قَالَ سَمِعَ اللهُ لِمَنْ حَمِدَهُ فَقُولُوا اللهُمَّ رَبَّنَا لَكَ الْحَمْدُ  

[Machine] The Messenger of Allah ﷺ used to teach us not to rush the Imam in bowing, so when he says "Allahu Akbar", say "Allahu Akbar", and when he prostrates, prostrate. And when he says, "Not (the way) of those who have earned Your anger, nor of those who have gone astray," say "Ameen" because when the words of the angels coincide with this, then the sins of those who are in the mosque are forgiven. And when he says, "Allah listens to the one who praises Him," say "Our Lord, to You is the praise."  

كَانَ رَسُولُ اللهِ ﷺ يُعَلِّمُنَا أَنْ لَا تُبَادِرُوا الْإِمَامَ بِالرُّكُوعِ فَإِذَا كَبَّرَ فَكَبِّرُوا وَإِذَا سَجَدَ فَاسْجُدُوا وَإِذَا قَالَ {غَيْرِ الْمَغْضُوبِ عَلَيْهِمْ وَلَا الضَّالِّينَ} [الفاتحة 7] فَقُولُوا آمِينَ فَإِنَّهُ إِذَا وَافَقَ كَلَامَ الْمَلَائِكَةِ غُفِرَ لِمَنْ فِي الْمَسْجِدِ وَإِذَا قَالَ سَمِعَ اللهُ لِمَنْ حَمِدَهُ فَقُولُوا رَبَّنَا لَكَ الْحَمْدُ  

"إِنَّما الإِمَامُ لِيُؤْتَمَّ بِه، فإِذا كبَّرَ فَكبِّرُوا، وَإذا رَكعَ، فارْكعُوا، وإِذا قال: سمع اللَّهُ لِمَنْ حَمِدَه -فقُولوا: الحَمْدُ للَّه".  

"إِنَّما جعلَ الإِمامُ ليؤتَمَّ به، فإِذا كبَّر فكبِّروا، وإِذا قَرأ فأَنْصِتُوا، وإِذا قال، {غَيْرِ الْمَغْضُوبِ عَلَيْهِمْ وَلَا الضَّالِّينَ}، فقُولوا: آمين، وإذا رَكَعَ فاركعوا، وإذا قال: سمع اللَّه لمن حَمِدَهُ فقولوا: اللَّهُمَّ ربّنا ولك الحمد، وإذا سَجَدَ فاسْجُدُوا. وإِذا صلى جالسًا فصَلُّوا جلوسًا".