حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، حَدَّثَنَا ابْنُ لَهِيعَةَ، عَنْ يَزِيدَ، - يَعْنِي ابْنَ أَبِي حَبِيبٍ - عَنْ مُحَمَّدِ بْنِ عَمْرِو بْنِ حَلْحَلَةَ، عَنْ مُحَمَّدِ بْنِ عَمْرٍو الْعَامِرِيِّ، قَالَ كُنْتُ فِي مَجْلِسٍ مِنْ أَصْحَابِ رَسُولِ اللَّهِ صلى الله عليه وسلم فَتَذَاكَرُوا صَلاَةَ رَسُولِ اللَّهِ صلى الله عليه وسلم فَقَالَ أَبُو حُمَيْدٍ فَذَكَرَ بَعْضَ هَذَا الْحَدِيثِ وَقَالَ فَإِذَا رَكَعَ أَمْكَنَ كَفَّيْهِ مِنْ رُكْبَتَيْهِ وَفَرَّجَ بَيْنَ أَصَابِعِهِ ثُمَّ هَصَرَ ظَهْرَهُ غَيْرَ مُقْنِعٍ رَأْسَهُ وَلاَ صَافِحٍ بِخَدِّهِ وَقَالَ فَإِذَا قَعَدَ فِي الرَّكْعَتَيْنِ قَعَدَ عَلَى بَطْنِ قَدَمِهِ الْيُسْرَى وَنَصَبَ الْيُمْنَى فَإِذَا كَانَ فِي الرَّابِعَةِ أَفْضَى بِوَرِكِهِ الْيُسْرَى إِلَى الأَرْضِ وَأَخْرَجَ قَدَمَيْهِ مِنْ نَاحِيَةٍ وَاحِدَةٍ ‏.‏
Translation
‘Amr al-Amiri said

I was in a gathering of the companions of the Messenger of Allah (ﷺ), and they were discussing the prayer of the Messenger of Allah (ﷺ). Abu Humaid said—mentioning part of this hadith—"When he bowed, he placed his hands firmly on his knees, spread his fingers, and arched his back without raising his head too high or lowering it excessively, nor turning his cheek. When he sat in the two rak'ahs, he sat on the sole of his left foot and kept the right foot upright. And when he was in the fourth rak'ah, he brought his left hip down to the ground and extended his feet out from one side."