The Book of Prayers (Kitab Al-Salat)

Muslim :: Book 4 : Hadith 1089

Mus'ab b. Sa'd reported: I said prayer by the side of my father and placed my hands between my knees. My father said to me: Place your hands on your knees. I repeated that (the previous act) for the second time, and he struck at my hands and said: We have been forbidden to do so and have been commanded to place our palms on the knees.

Source materials are from the University of Southern California MSA site
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