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bukhari:790Abū al-Walīd > Shuʿbah > Abū Yaʿfūr > Muṣʿab b. Saʿd

I offered prayer beside my father and approximated both my hands and placed them in between the knees. My father told me not to do so and said, "We used to do the same but we were forbidden (by the Prophet) to do it and were ordered to place the hands on the knees."  

البخاري:٧٩٠حَدَّثَنَا أَبُو الْوَلِيدِ قَالَ حَدَّثَنَا شُعْبَةُ عَنْ أَبِي يَعْفُورٍ قَالَ سَمِعْتُ مُصْعَبَ بْنَ سَعْدٍ يَقُولُ

صَلَّيْتُ إِلَى جَنْبِ أَبِي فَطَبَّقْتُ بَيْنَ كَفَّىَّ ثُمَّ وَضَعْتُهُمَا بَيْنَ فَخِذَىَّ فَنَهَانِي أَبِي وَقَالَ كُنَّا نَفْعَلُهُ فَنُهِينَا عَنْهُ وَأُمِرْنَا أَنْ نَضَعَ أَيْدِيَنَا عَلَى الرُّكَبِ  


See similar narrations below:

Collected by Abū Dāwūd
abudawud:867Ḥafṣ b. ʿUmar > Shuʿbah > Abū Yaʿfūr > Abū Dāwud Wāsmuh And Qdān > Muṣʿab b. Saʿd

I prayed by the side of my father. I put both of my hands between my knees(in bowing condition). He prohibited me from it. I then repeated; so he said: Do not do so, because we used to do so. But we were prohibited to do that, and commanded to put our hands on the knees.  

أبو داود:٨٦٧حَدَّثَنَا حَفْصُ بْنُ عُمَرَ حَدَّثَنَا شُعْبَةُ عَنْ أَبِي يَعْفُورٍ قَالَ أَبُو دَاوُدَ وَاسْمُهُ وَقْدَانُ عَنْ مُصْعَبِ بْنِ سَعْدٍ قَالَ

صَلَّيْتُ إِلَى جَنْبِ أَبِي فَجَعَلْتُ يَدَىَّ بَيْنَ رُكْبَتَىَّ فَنَهَانِي عَنْ ذَلِكَ فَعُدْتُ فَقَالَ لاَ تَصْنَعْ هَذَا فَإِنَّا كُنَّا نَفْعَلُهُ فَنُهِينَا عَنْ ذَلِكَ وَأُمِرْنَا أَنْ نَضَعَ أَيْدِيَنَا عَلَى الرُّكَبِ