I came to the Prophet (ﷺ) from behind. I saw the whiteness of his armpits and he kept his arms away from his sides and raised his stomach (from the ground).
Sunan Abi Dawud Book 2, Hadith 509
← Previous Hadith When the Prophet(ﷺ) prostrated himself, he kept his arms so far away from his sides that if a lamb had wanted to pass under his arms, it could have done so.

Sunan Abi Dawud Book 2, Hadith 508 Next Hadith → When the Messenger of Allah (ﷺ) prostrated himself, he kept his arms far away from his sides so much so that we took pity on him.

Sunan Abi Dawud Book 2, Hadith 510