Malik Muwatta: Hadith 163

Yahya related to me from Malik from Ibn Shihab from Salim ibn Abdullah from Abdullah ibn Umar that the Messengerof Allah (ﷺ) used to raise his hands to the level of his shoulders when he began the prayer and when he raised his head from the ruku he raised them in the same way, saying, "Allah hears whoever praises him, our Lord and praise belongs to You." He did not raise them in the sujud.