Jabir said, "In Madina, the Messenger of Allah, may Allah bless him and grant him peace, was thrown from a horse onto a palm trunk and dislocated his foot. We used to visit him in the room of 'A'isha. We came upon him while he was praying sitting down and we prayed standing behind him. He indicates to us that we should sit down. When he finished the prayer, he said, 'When the Imam prays sitting, then pray sitting. When he prays standing, then pray standing. Do not stand while the imam is sitting as the Persians do with their great men.'"  

عَنْ جَابِرٍ قَالَ صُرِعَ رَسُولُ اللهِ ﷺ مِنْ فَرَسٍ بِالْمَدِينَةِ عَلَى جِذْعِ نَخْلَةٍ فَانْفَكَّتْ قَدَمُهُ فَكُنَّا نَعُودُهُ فِي مَشْرُبَةٍ لِعَائِشَةَ رَضِيَ اللَّهُ عَنْهَا فَأَتَيْنَاهُ وَهُوَ يُصَلِّي قَاعِدًا فَصَلَّيْنَا قِيَامًا ثُمَّ أَتَيْنَاهُ مَرَّةً أُخْرَى وَهُوَ يُصَلِّي الْمَكْتُوبَةَ قَاعِدًا فَصَلَّيْنَا خَلْفَهُ قِيَامًا فَأَوْمَأَ إِلَيْنَا أَنِ اقْعُدُوا فَلَمَّا قَضَى الصَّلاَةَ قَالَ إِذَا صَلَّى الإِمَامُ قَاعِدًا فَصَلُّوا قُعُودًا وَإِذَا صَلَّى قَائِمًا فَصَلُّوا قِيَامًا وَلاَ تَقُومُوا وَالإِمَامُ قَاعِدٌ كَمَا تَفْعَلُ فَارِسُ بِعُظَمَائِهِمْ  

He also said, "One of the slaves of the Ansar had a son whom he named Muhammad, The Ansar said, 'We will not give you the kunya of the Messenger of Allah until we have sat in the road and asked the Prophet about the Final Hour.' The Prophet said, 'You have come to me to ask me about the Hour?' 'Yes,' we replied. He said, 'There is no one alive now who will see it, even if he lives a hundred years.' We said, 'A slave of the Ansar has had a son and named him Muhammad. The Ansar said, "We will not call you by the kunya of the Messenger of Allah."' The Prophet said, 'You have done well. Call yourselves with my name, but do not use my kunya.'"  

قَالَ وَوُلِدَ لِفُلاَنٍ مِنَ الأَنْصَارِ غُلامٌ فَسَمَّاهُ مُحَمَّدًا فَقَالَتِ الأنْصَارُ لا نُكَنِّيكَ بِرَسُولِ اللهِ حَتَّى قَعَدْنَا فِي الطَّرِيقِ نَسْأَلُهُ عَنِ السَّاعَةِ فَقَالَ جِئْتُمُونِي تَسْأَلُونِي عَنِ السَّاعَةِ؟ قُلْنَا نَعَمْ قَالَ مَا مِنْ نَفْسٍ مَنْفُوسَةٍ يَأْتِي عَلَيْهَا مِئَةُ سَنَةٍ قُلْنَا وُلِدَ لِفُلاَنٍ مِنَ الأَنْصَارِ غُلاَمٌ فَسَمَّاهُ مُحَمَّدًا فَقَالَتِ الأنْصَارُ لا نُكَنِّيكَ بِرَسُولِ اللهِ قَالَ أَحْسَنَتِ الأَنْصَارُ سَمُّوا بِاسْمِي ولا تَكْتَنُوا بِكُنْيَتِي