Sunan Abi Dawud Book 2, Hadith 449

When he prostrated himself, his knees fell on the ground before his hands had fallen. Hemmam said: This tradition has also been transmitted by ‘Asim b. Kulaib through a different chain of narrators to the same effect. And one of these two versions, and probably the version narrated by Muhammad b. Juhadah, has the words: When he stood up (after prostration), he stood up on his knees taking the support of his thighs.