´It was narrated that Mus'ab bin Sa'd said:` "I prayed beside my father and I put my hands between my knees, and he told me: 'Put your hands on your knees.' Then I did that again and he struck my hands and said: 'We were forbidden to do that, and we were commanded to put our hands on our knees.'"
Hadith Referenceسنن نسائي / كتاب التطبيق / 1033
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:متفق عليه
´It was narrated that Mus'ab bin Sa'd said:` "I bowed and put my hands together, and my father said: 'This is something that we used to do, then we brought them up to our knees.'"