´It was narrated that Mus’ab bin Sa’d said:` “I bowed (in prayer) beside my father, and I put my hands between my knees. He struck my hand and said: ‘We used to do that, then we were commanded to put them on the knees.’”
Hadith ReferenceSunan Ibn Majah / Establishing the Prayer and the Sunnah Regarding Them / Hadith: 873
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:بخاري ومسلم