سنن أبي داود 962

It was reported from Ibrahim that he said:"When the Prophet (ﷺ) would sit in the prayer, he would place his left foot horizontally - so much so that the upper-part of his foot became black

Rapporté d’Ibrahim : Quand le Prophète ﷺ s’asseyait pendant la prière, il posait son pied gauche à plat — à tel point que le dessus de son pied devenait noir