Sunan Abi Dawud, 747

Rapporté par Abdullah ibn Mas‘ud رضي الله عنه : Le Messager d’Allah ﷺ nous a appris comment prier. Il a ensuite prononcé le takbir (Allah est le plus grand) et levé les mains ; quand il s’est incliné, il a joint les mains et les a placées entre ses genoux. Quand ce récit est parvenu à Sa‘d, il a dit : Mon frère a dit vrai. Nous faisions cela ; puis on nous a ensuite ordonné de faire ceci, c’est-à-dire de poser les mains sur les genoux

Narrated Abdullah ibn Mas'ud: The Messenger of Allah (ﷺ) taught us how to pray. He then uttered the takbir (Allah is most great) and raised his hands; when he bowed, he joined his hands and placed them between his knees. When this (report) reached Sa'd, he said: My brother said truly. We used to do this; then we were later on commanded to do this, that is, to place the hands on the knees