Sayyiduna Abdullah bin Umar (may Allah be pleased with them) narrated that I saw the Messenger of Allah (peace and blessings be upon him) when he stood for prayer, he raised his hands at the time of the opening Takbir, his hands reaching up to his shoulders. Similarly, when he said the Takbir for bowing (ruku‘), he would also raise his hands, and when he raised his head from bowing, he would do the same. At that time, he would say: "Sami‘ Allahu liman hamidah" (Allah hears the one who praises Him). However, he did not raise his hands during prostration (sajdah).