It wasnarrated that 'Umair bin Habib said:
"The Messenger of Allah(ﷺ) used to raise his hands at every Takbir (saying Allahu Akbar)inthe obligatory prayer." (ES)
English reference (ES): Vol. 1, Book 5, Hadith 861 (ES)
Arabic reference (ES): Book 5, Hadith 910 (ES)