When the Messenger of Allah ﷺ began the prayer, he would raise his hands level with his shoulders. He would do the same when he said the takbir for bowing, and when he raised his head from bowing he would raise them in the same way, saying, "Allah hears whoever praises Him. Our Lord, to You belongs all praise." He did not do this during the prostration.
أخبرنا سويد بن نصر قال أنبأنا عبد الله عن مالك عن ابن شهاب عن سالم
أن رسول الله ﷺ كان إذا افتتح الصلاة رفع يديه حذو منكبيه وإذا كبر للركوع وإذا رفع رأسه من الركوع رفعهما كذلك أيضا وقال سمع الله لمن حمده ربنا ولك الحمد وكان لا يفعل ذلك في السجود