Sunan Ibn Majah
1625
Sahih+3

It was narrated from Umm Salamah that the Messenger of Allah (ﷺ) used to say, during the illness that would be his last:“The prayer, and those whom your hands possess.”* And he kept on saying it until his tongue could no longer utter any words

SahihAl-Albani
SahihMuhammad Fouad Abd al-Baqi