[Machine] He used to raise his hands when he begins the prayer, when he bows, and when he stands up straight after bowing, aligning his shoulders with his ears. The Messenger of Allah ﷺ used to do that.
أَنَّهُ كَانَ يَرْفَعُ يَدَيْهِ حِينَ يَفْتَتِحُ الصَّلَاةَ وَإِذَا رَكَعَ وَإِذَا اسْتَوَى قَائِمًا مِنْ رُكُوعِهِ حَذْوَ مَنْكِبَيْهِ وَيَقُولُ كَانَ رَسُولُ اللهِ ﷺ يَفْعَلُ ذَلِكَ
I saw the Messenger of Allah ﷺ raising his hands apposite the shoulders at the time of beginning the prayer and before bowing down and after coming back to the position after bowing. but he did not raise them between two prostrations.
رَأَيْتُ رَسُولَ اللَّهِ ﷺ إِذَا افْتَتَحَ الصَّلاَةَ رَفَعَ يَدَيْهِ حَتَّى يُحَاذِيَ مَنْكِبَيْهِ وَقَبْلَ أَنْ يَرْكَعَ وَإِذَا رَفَعَ مِنَ الرُّكُوعِ وَلاَ يَرْفَعُهُمَا بَيْنَ السَّجْدَتَيْنِ
His father said: "I saw the Messenger of Allah ﷺ when he started to pray, raise his hands until they were parallel to his shoulders, (and he did that) when he bowed and when he raised his head from bowing."
رَأَيْتُ رَسُولَ اللَّهِ ﷺ إِذَا افْتَتَحَ الصَّلاَةَ يَرْفَعُ يَدَيْهِ حَتَّى يُحَاذِيَ مَنْكِبَيْهِ وَإِذَا رَكَعَ وَإِذَا رَفَعَ رَأْسَهُ مِنَ الرُّكُوعِ
His father said: "I saw the Messenger of Allah ﷺ when he started to pray, raise his hands until they were parallel to his shoulders, (and he did that) when he bowed and when he raised his head from bowing." (Using translation from Nasāʾī 1025)
رَأَيْتُ رَسُولَ اللهِ ﷺ «إِذَا افْتَتَحَ الصَّلَاةَ يَرْفَعُ يَدَيْهِ حَتَّى يُحَاذِي مَنْكِبَيْهِ وَإِذَا رَكَعَ وَإِذَا رَفَعَ رَأْسَهُ مِنَ الرُّكُوعِ»