It wasnarrated from Abu Hurairah that a black woman used to sweepthemosque. The Messenger of Allah (ﷺ) noticed she was missing andheasked about her after a few days. He was told that she had died. Hesaid:
"Why did you not tell me?" Then he went to her grave andofferedthe funeral prayer for her.
English reference: Vol. 1, Book 6, Hadith 1527
Arabic reference: Book 6, Hadith 1594