Al-Muwatta de Malik, 378

Abou Hazem Ibn Dinar a rapporté que Sahl Ibn Sa'd a dit: «on ordonnait aux gens de placer la main droite sur le bras gauche pendant la prière. Abou Hazem a ajouté: «Je ne sais pas si c'était des paroles du Prophète (salallahou alayhi wa salam) (Sur lui la grâce et la paix d'Allah). Chapitre XVI Le quounoute à la prière de l'aube

Yahya related to me from Malik from Abu Hazim ibn Dinar that Sahl ibn Sad said, "People used to be ordered to place their right hands on their left forearms in the prayer." Abu Hazim added, "I know for sure that Sahl traces that back to the Prophet, may Allah bless him and grant him peace