Hadith 185

Sahih Bukhari

Book 10: Call to Prayers (Adhaan)

Chapter 118

To put the hands (palms) on both knees while bowing.

باب وَضْعِ الأَكُفِّ عَلَى الرُّكَبِ فِي الرُّكُوعِ

While in the company of his companions, Abu Humaid said, "The Prophet ﷺ used to put both his hands on his knees." ​​
وَقَالَ أَبُو حُمَيْدٍ فِي أَصْحَابِهِ أَمْكَنَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَدَيْهِ مِنْ رُكْبَتَيْهِ.
Sahih al-Bukhari 790
حَدَّثَنَا 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.‏
Mus`ab bin Sa`d:

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."