أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم كَانَ يَرْفَعُ يَدَيْهِ حَذْوَ مَنْكِبَيْهِ إِذَا افْتَتَحَ الصَّلاَةَ، وَإِذَا كَبَّرَ لِلرُّكُوعِ، وَإِذَا رَفَعَ رَأْسَهُ مِنَ الرُّكُوعِ رَفَعَهُمَا كَذَلِكَ أَيْضًا وَقَالَ " سَمِعَ اللَّهُ لِمَنْ حَمِدَهُ، رَبَّنَا وَلَكَ الْحَمْدُ ". وَكَانَ لاَ يَفْعَلُ ذَلِكَ فِي السُّجُودِ.
Ibn Umar reported that the Messenger of Allah ﷺ used to raise his hands level with his shoulders when he opened the prayer and when he said the takbir for bowing; and when he raised his head from bowing, he raised them likewise as well and …
also in Sahih al-Bukhari 736, Sahih al-Bukhari 738, Sahih al-Bukhari 739