Sunan Abi Dawud Book 2, Hadith 346
When he prostrated, his knees touched the ground before his palms touched it; when he prostrated himself, he placed his forehead on the ground between his palms, and kept his armpits away from his sides.
Hajjaj reported from Hammam and Shaqiq narrated a similar tradition to us from ‘Asim b. Kulaib on the authority of his father from the Prophet(ﷺ).
And another version narrated by one of them has-and I think in all probability that this version has been narrated by Muhammad b. Juhadah-when he got up (after prostration), he got up with his knees and gave his weight on his thighs.
When he (the Prophet) prostrated he kept his thighs wide and did not let his belly touch the thighs.
Abu Dawud says that Ibn Mubarak narrated this hadith from ‘Abbas b. Sahl, which he did not remember well. It is thought that he has mentioned ‘Isa b. ‘Abd Allah, ‘Abbas b. Sahl and Abu Humaid al-Sa’idi.
I saw the Messenger of Allah (ﷺ) raising his thumbs in prayer up to the lobes of his ears.