Musnad Abu Ya'la al-Mawsili 153:85

Abu Khaythama narrated to us, Ismail bin Abi Uways narrated to us, Malik narrated to me, from Ibn Shihab, from Salim, from his father Abdullah bin Umar, that the Messenger of Allah (may Allah bless him and grant him peace) used to, when he raised his head from the bowing (ruku), raise his hands and say: "Allah hears those who praise Him. Our Lord, and to You is the praise."