(61) باب الصَّلاَةِ عَلَى الْقَبْرِ
Narrated Abu Hurairah:
A negress (or a youth) used to sweep the mosque. The Prophet (ﷺ) missed him, and when he asked about him the people told him that he had died. He said: Why have you not informed me ? He said: Lead me to his grave. So they led him and he prayed over him.
Reference: Sunan Abi Dawud 3203
In-book reference: Book 21, Hadith 115
English translation: Book 20, Hadith 3197