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." (TR)
English reference (TR): Vol. 1, Book 5, Hadith 861 (TR)
Arabic reference (TR): Book 5, Hadith 910 (TR)