I saw the Prophet ﷺ open the prayer with the takbir, raising his hands as he said it until they were level with his shoulders. When he said the takbir for bowing, he did the same. When he said, "Allah hears whoever praises Him," he did the same and said, "Our Lord, to You belongs all praise." But he did not do so when he prostrated, nor when he raised his head from prostration.
حدثنا أبو اليمان قال أخبرنا شعيب عن الزهري قال أخبرنا سالم بن عبد الله أن
رأيت النبي ﷺ افتتح التكبير في الصلاة فرفع يديه حين يكبر حتى يجعلهما حذو منكبيه وإذا كبر للركوع فعل مثله وإذا قال سمع الله لمن حمده فعل مثله وقال ربنا ولك الحمد ولا يفعل ذلك حين يسجد ولا حين يرفع رأسه من السجود