Sunan an-Nasa'i #1032 · The Book of The At-Tatbiq (Clasping One's Hands Together)

Sunan an-Nasa'iIt was narrated that Mus'ab bin Sa'd said
Sunan an-Nasa'i · Book 12 · The Book of The At-Tatbiq (Clasping One's Hands Together)
Sunan an-Nasa'i · كتاب 12 · كتاب التطبيق
"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
أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا أَبُو عَوَانَةَ، عَنْ أَبِي يَعْفُورٍ، عَنْ مُصْعَبِ بْنِ سَعْدٍ، قَالَ صَلَّيْتُ إِلَى جَنْبِ أَبِي وَجَعَلْتُ يَدَىَّ بَيْنَ رُكْبَتَىَّ فَقَالَ لِي اضْرِبْ بِكَفَّيْكَ عَلَى رُكْبَتَيْكَ ‏.‏ قَالَ ثُمَّ فَعَلْتُ ذَلِكَ مَرَّةً أُخْرَى فَضَرَبَ يَدِي وَقَالَ إِنَّا قَدْ نُهِينَا عَنْ هَذَا وَأُمِرْنَا أَنْ نَضْرِبَ بِالأَكُفِّ عَلَى الرُّكَبِ ‏.‏
Reference : Sunan an-Nasa'i 1032In-book reference : Book 12, Hadith 4