Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
muslim:535cAbū Bakr b. Abū Shaybah > Wakīʿ > Ismāʿīl b. Abū Khālid > al-Zubayr b. ʿAdī > Muṣʿab b. Saʿd

I bowed and my hands were in this state, i. e. they were put together, palm to palm, and were placed between his thighs. My father said: We used to do like this but were later on commanded to place them on the knees.  

مسلم:٥٣٥cحَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ حَدَّثَنَا وَكِيعٌ عَنْ إِسْمَاعِيلَ بْنِ أَبِي خَالِدٍ عَنِ الزُّبَيْرِ بْنِ عَدِيٍّ عَنْ مُصْعَبِ بْنِ سَعْدٍ قَالَ

رَكَعْتُ فَقُلْتُ بِيَدَىَّ هَكَذَا يَعْنِي طَبَّقَ بِهِمَا وَوَضَعَهُمَا بَيْنَ فَخِذَيْهِ فَقَالَ أَبِي قَدْ كُنَّا نَفْعَلُ هَذَا ثُمَّ أُمِرْنَا بِالرُّكَبِ