سُنَنُ النَّسَائِيِّ
Sunan an-Nasa’i 1109
The Book of The At-Tatbiq (Clasping One's Hands Together)
Holding the arms out from one's side when prostrating
أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا سُفْيَانُ، عَنْ عُبَيْدِ اللَّهِ، - وَهُوَ ابْنُ عَبْدِ اللَّهِ بْنِ الأَصَمِّ - عَنْ عَمِّهِ، يَزِيدَ - وَهُوَ ابْنُ الأَصَمِّ - عَنْ مَيْمُونَةَ، أَنَّ النَّبِيَّ صلى الله عليه وسلم كَانَ إِذَا سَجَدَ جَافَى يَدَيْهِ حَتَّى لَوْ أَنَّ بَهْمَةً أَرَادَتْ أَنْ تَمُرَّ تَحْتَ يَدَيْهِ مَرَّتْ .
It was narrated from Maimunah that: When the Prophet (ﷺ) prostrated he would hold his arms out from his sides so that if a lamb wanted to pass beneath his arms it would be able to do so.
Sunan an-Nasa'i, 1109Sahih (Darussalam)