The Book of Mosques and Places of Prayer
كتاب الْمَسَاجِدِ وَمَوَاضِعِ الصَّلاَةِ
Read the English translation first, with the original Arabic directly underneath.
The virtue of the Subh and the `Asr prayers, and of maintaining them
Mus'ab b. Sa'd b. Abu Waqqas reported:
I said prayer by the side of my father. When I bowed I intertwined my fingers and placed them between my knees. He struck my hands. When he completed the prayer he said: We used to do that but then were commanded to lift (our palms) to the knees.
حَدَّثَنِي الْحَكَمُ بْنُ مُوسَى، حَدَّثَنَا عِيسَى بْنُ يُونُسَ، حَدَّثَنَا إِسْمَاعِيلُ بْنُ أَبِي خَالِدٍ، عَنِ الزُّبَيْرِ بْنِ عَدِيٍّ، عَنِ مُصْعَبِ بْنِ سَعْدِ بْنِ أَبِي وَقَّاصٍ، قَالَ صَلَّيْتُ إِلَى جَنْبِ أَبِي فَلَمَّا رَكَعْتُ شَبَّكْتُ أَصَابِعِي وَجَعَلْتُهُمَا بَيْنَ رُكْبَتَىَّ فَضَرَبَ يَدَىَّ فَلَمَّا صَلَّى قَالَ قَدْ كُنَّا نَفْعَلُ هَذَا ثُمَّ أُمِرْنَا أَنْ نَرْفَعَ إِلَى الرُّكَبِ .