"One day Messenger of Allah was sitting in the Masjid" Rifa'ah said: "And we were with him. Then what appeared to be a Bedouin man entered to pray, but he performed his Salat in a very brief manner. He then got up and greeted the prophet with Salam. The Prophet said (returning the greeting): 'And upon you. Go back and perform Salat, for indeed you have no prayed.' So he returned to perform Salat then came and greeted the Prophet with Salam. So he (the Prophet) said (returning the greeting): 'And upon you. Go back and perform Salat, for indeed you have not prayed.' [He did that] two or three times, each time coming to the Prophet, greeted the Prophet with Salam and the Prophet saying: 'And upon you. Go back and perform Salat, for indeed you have not prayed.' - until the people got scared and became very worried that one whose prayer was so brief had not actually prayed. Then in the end the man said: 'Then show me, and teach me, for I am a human who has suffered and is mistaken.' So he said: 'Alright. When you stand for Salat then perform Wudu as Allah ordered you. Then say the Tashahhud, and the Iqamah as well. If you know any Quran then recite it, if not then praise Allah, mention His greatness, and the Tahlil. Then bow such that you are at rest in your bowing, then stand completely, then prostrate completely, then sit such that you are at rest while sitting them stand. When you have done that, then you have completed your Salat, and if you leave out something, then you have made your Salat deficient.' And this was easier on them than the first matter, because if some of this was deficient, It would only reduce the reward of his Salat, it would not have gone entirely. "  

أَنَّ رَسُولَ اللَّهِ ﷺ بَيْنَمَا هُوَ جَالِسٌ فِي الْمَسْجِدِ يَوْمًا قَالَ رِفَاعَةُ وَنَحْنُ مَعَهُ إِذْ جَاءَهُ رَجُلٌ كَالْبَدَوِيِّ فَصَلَّى فَأَخَفَّ صَلاَتَهُ ثُمَّ انْصَرَفَ فَسَلَّمَ عَلَى النَّبِيِّ ﷺ فَقَالَ النَّبِيُّ ﷺ وَعَلَيْكَ فَارْجِعْ فَصَلِّ فَإِنَّكَ لَمْ تُصَلِّ فَرَجَعَ فَصَلَّى ثُمَّ جَاءَ فَسَلَّمَ عَلَيْهِ فَقَالَ وَعَلَيْكَ فَارْجِعْ فَصَلِّ فَإِنَّكَ لَمْ تُصَلِّ فَفَعَلَ ذَلِكَ مَرَّتَيْنِ أَوْ ثَلاَثًا كُلُّ ذَلِكَ يَأْتِي النَّبِيَّ ﷺ فَيُسَلِّمُ عَلَى النَّبِيِّ ﷺ فَيَقُولُ النَّبِيُّ ﷺ وَعَلَيْكَ فَارْجِعْ فَصَلِّ فَإِنَّكَ لَمْ تُصَلِّ فَخَافَ النَّاسُ وَكَبُرَ عَلَيْهِمْ أَنْ يَكُونَ مَنْ أَخَفَّ صَلاَتَهُ لَمْ يُصَلِّ فَقَالَ الرَّجُلُ فِي آخِرِ ذَلِكَ فَأَرِنِي وَعَلِّمْنِي فَإِنَّمَا أَنَا بَشَرٌ أُصِيبُ وَأُخْطِئُ فَقَالَ أَجَلْ إِذَا قُمْتَ إِلَى الصَّلاَةِ فَتَوَضَّأْ كَمَا أَمَرَكَ اللَّهُ ثُمَّ تَشَهَّدْ وَأَقِمْ فَإِنْ كَانَ مَعَكَ قُرْآنٌ فَاقْرَأْ وَإِلاَّ فَاحْمَدِ اللَّهَ وَكَبِّرْهُ وَهَلِّلْهُ ثُمَّ ارْكَعْ فَاطْمَئِنَّ رَاكِعًا ثُمَّ اعْتَدِلْ قَائِمًا ثُمَّ اسْجُدْ فَاعْتَدِلْ سَاجِدًا ثُمَّ اجْلِسْ فَاطْمَئِنَّ جَالِسًا ثُمَّ قُمْ فَإِذَا فَعَلْتَ ذَلِكَ فَقَدْ تَمَّتْ صَلاَتُكَ وَإِنِ انْتَقَصْتَ مِنْهُ شَيْئًا انْتَقَصْتَ مِنْ صَلاَتِكَ قَالَ وَكَانَ هَذَا أَهْوَنَ عَلَيْهِمْ مِنَ الأَوَّلِ أَنَّهُ مَنِ انْتَقَصَ مِنْ ذَلِكَ شَيْئًا انْتَقَصَ مِنْ صَلاَتِهِ وَلَمْ تَذْهَبْ كُلُّهَا قَالَ وَفِي الْبَابِ عَنْ أَبِي هُرَيْرَةَ وَعَمَّارِ بْنِ يَاسِرٍ  

"Messenger of Allah entered the Masjid, and a man entered and offered Salat. Then he came to give Salam to the Propet. He returned the Salam to him and said: 'Go back and perform Salat, for indeed you have not prayed.' So the man returned to pray as he had prayed. Then he came to give Salam to the Prophet. He returned Salam to him, then [Messenger of Allah] said: 'Go back and perform Salat, for indeed you have not prayed' until he had done that three times. So the man said to him: 'By the One who sent you with the Truth, I do not know any better than this, so teach me.' So he said [to him]: 'When you stand for Salat then say the Takbir, then recite what is easy for you of the Quran. Then bow until you are at rest while bowing, then rise up until you are at rest sitting. Do that in all of your Salat.'"  

أَنَّ رَسُولَ اللَّهِ ﷺ دَخَلَ الْمَسْجِدَ فَدَخَلَ رَجُلٌ فَصَلَّى ثُمَّ جَاءَ فَسَلَّمَ عَلَى النَّبِيِّ ﷺ فَرَدَّ عَلَيْهِ السَّلاَمَ فَقَالَ ارْجِعْ فَصَلِّ فَإِنَّكَ لَمْ تُصَلِّ فَرَجَعَ الرَّجُلُ فَصَلَّى كَمَا كَانَ صَلَّى ثُمَّ جَاءَ إِلَى النَّبِيِّ ﷺ فَسَلَّمَ عَلَيْهِ فَرَدَّ عَلَيْهِ السَّلاَمَ فَقَالَ لَهُ رَسُولُ اللَّهِ ﷺ ارْجِعْ فَصَلِّ فَإِنَّكَ لَمْ تُصَلِّ حَتَّى فَعَلَ ذَلِكَ ثَلاَثَ مِرَارٍ فَقَالَ لَهُ الرَّجُلُ وَالَّذِي بَعَثَكَ بِالْحَقِّ مَا أُحْسِنُ غَيْرَ هَذَا فَعَلِّمْنِي فَقَالَ إِذَا قُمْتَ إِلَى الصَّلاَةِ فَكَبِّرْ ثُمَّ اقْرَأْ بِمَا تَيَسَّرَ مَعَكَ مِنَ الْقُرْآنِ ثُمَّ ارْكَعْ حَتَّى تَطْمَئِنَّ رَاكِعًا ثُمَّ ارْفَعْ حَتَّى تَعْتَدِلَ قَائِمًا ثُمَّ اسْجُدْ حَتَّى تَطْمَئِنَّ سَاجِدًا ثُمَّ ارْفَعْ حَتَّى تَطْمَئِنَّ جَالِسًا وَافْعَلْ ذَلِكَ فِي صَلاَتِكَ كُلِّهَا