[Machine] He saw the Messenger of Allah ﷺ while he was praying, and when he was in the last part of his prayer, he did not get up until he sat straight.  

أَنَّهُ رَأَى رَسُولَ اللهِ ﷺ وَهُوَ يُصَلِّي فَإِذَا كَانَ فِي وِتْرٍ مِنْ صَلَاتِهِ لَمْ يَنْهَضْ حَتَّى يَسْتَوِيَ قَاعِدًا  

[Machine] I heard Abu Humaid Al-Sa'idi talk about ten of the Prophet's companions, among them Abu Qatada. He mentioned the hadith about the description of the Prophet's prayer, in which he mentions the prostration part. Then he raises his head saying "Allah is the Greatest" and then he bends his leg and sits on it, maintaining balance until every bone returns to its place, also balanced.  

سَمِعْتُ أَبَا حُمَيْدٍ السَّاعِدِيَّ فِي عَشَرَةٍ مِنْ أَصْحَابِ النَّبِيِّ ﷺ فِيهِمْ أَبُو قَتَادَةَ فَذَكَرَ الْحَدِيثَ فِي صِفَةِ صَلَاةِ النَّبِيِّ ﷺ وَفِيهِ ثُمَّ يَعُودُ يَعْنِي إِلَى السُّجُودِ ثُمَّ يَرْفَعُ فَيَقُولُ اللهُ أَكْبَرُ ثُمَّ يَثْنِي رِجْلَهُ فَيَقْعُدُ عَلَيْهَا مُعْتَدِلًا حَتَّى يَرْجِعَ أَوْ يَقِرَّ كُلُّ عَظْمٍ مَوْضِعَهُ مُعْتَدِلًا