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»