Sahih Muslim, 1196

Ibn Sa'd reported:I bowed and my hands were in this state, i. e. they were put together, palm to palm, and were placed between his thighs. My father said: We used to do like this but were later on commanded to place them on the knees

Rapporté par Ibn Sa‘d : Je me suis incliné et mes mains étaient ainsi, c’est-à-dire jointes paume contre paume, placées entre mes cuisses. Mon père a dit : « Nous faisions comme cela, mais on nous a ensuite ordonné de les poser sur les genoux. »