The Prophet ﷺ would raise his hands to the level of his shoulders when he said the opening takbir of the prayer, when he bowed, and when he prostrated.
حدثنا الحكم بن نافع حدثنا إسماعيل بن عياش عن صالح بن كيسان عن عبد الرحمن الأعرج
أن النبي ﷺ كان يرفع يديه حذو منكبيه حين يكبر ويفتتح الصلاة وحين يركع وحين يسجد
Its isnad is sahih. Ismail bin Ayyash, discussion of him has already preceded, 530, 1738. Abdul-Rahman Araj is Abdul-Rahman bin Hurmuz Araj, a trustworthy successor, whom Abu Zura, Ajli, and others declared trustworthy, and he was knowledgeable in genealogy and the Arabic language. The hadith was narrated by Ibn Majah 1:1462 through the route of Ismail bin Ayyash with this isnad. The hadith was narrated by Ibn Majah 1:1462 through the route of Ismail bin Ayyash, with this isnad, and his commentator quoted from the additions of Busiri, who said, its isnad is daif, and it contains the narration of Ismail bin Ayyash from the Hijazis, which is daif.It was also narrated by Abu Dawud 1:268-269 through the route of Layth bin Saad, from Yahya bin Ayub, from Ibn Jurayj, from Ibn Shihab, from Abu Bakr bin Harith bin Hisham, from Abu Hurairah, in similar wording, with an addition at the end, "and when he rose from the two prostrations he did the same."Zaylai said in Nasb Raya 1:414, the Shaykh (meaning Ibn Daqiq Eid) said in Al-Imam, all of these are men of the Sahih. This hadith belongs to the musnad of Abu Hurairah, and it was mentioned here to match the following hadith of Ibn Umar which is similar to it, but it was not mentioned in its proper place within the musnad of Abu Hurairah, and for that reason its location remains hidden from anyone seeking it in the Musnad.