(161) باب الرُّخْصَةِ فِي ذَلِكَ لِلضَّرُورَةِ
Narrated AbuHurayrah:
The Companions of the Prophet (ﷺ) complained to the Prophet (ﷺ) about the hardship when they kept their forearms far away from their sides while prostrating. He said: Take help with the elbows (by spreading them on the ground and sticking them to the sides).
Reference: Sunan Abi Dawud 902
In-book reference: Book 2, Hadith 512
English translation: Book 3, Hadith 901