“The Messenger of Allah ﷺ used to bow with his hands on his knees and his upper arms held away from his sides.”
كَانَ رَسُولُ اللَّهِ ﷺ يَرْكَعُ فَيَضَعُ يَدَيْهِ عَلَى رُكْبَتَيْهِ وَيُجَافِي بِعَضُدَيْهِ
[Machine] I saw the Messenger of Allah ﷺ bowing and placing his hands on his knees.
رَأَيْتُ رَسُولَ اللهِ ﷺ رَكَعَ فَوَضَعَيَدَيْهِ عَلَى رُكْبَتَيْهِ