It wasnarrated that Abu Hurairah said:
"I saw the Messenger of Allah(ﷺ) raising his hands during prayer until they were parallel withhis shoulders when he started to pray, when he bowed and when heprostrated." (ID)
English reference (ID): Vol. 1, Book 5, Hadith 860 (ID)
Arabic reference (ID): Book 5, Hadith 909 (ID)