Sahih Muslim, 2215

It is narrated on the authority of Abu Huraira that a dark-complexioned woman (or a youth) used to sweep the mosque. The Messenger of Allah (ﷺ) missed her (or him) and inquired about her (or him). The people told him that she (or he) had died. He asked why they did not inform him, and it appears as if they had treated her (or him) or her (or his) affairs as of little account. He (the Holy Prophet) said:Lead me to her (or his) grave. They led him to that place and he said prayer over her (or him) and then remarked: Verily, these graves are full of darkness for their dwellers. Verily, the Mighty and Glorious Allah illuminates them for their occupants by reason of my prayer over them

Rapporté par Abu Huraira رضي الله عنه : Une femme à la peau foncée avait l’habitude de balayer la mosquée. Le Messager d’Allah ﷺ remarqua son absence et demanda après elle. Les gens lui dirent qu’elle était décédée. Il demanda pourquoi on ne l’en avait pas informé, et il sembla qu’ils avaient considéré sa personne ou son affaire comme peu importante. Le Prophète ﷺ dit : « Conduisez-moi à sa tombe. » Ils l’y menèrent, il pria sur elle puis déclara : « En vérité, ces tombes sont pleines d’obscurité pour leurs occupants. Mais, par ma prière sur eux, Allah le Tout-Puissant et Glorieux les éclaire pour ceux qui y reposent. »