السلام عليكم The Prophet (pbuh) passed by a grave and asked his companions about it. His companions replied it is the grave of Umm Muhjan. The Prophet (pbuh) rebuked them because they did not inform him of her death and then prayed the funeral prayer over her. He then said: ‘Why did you not inform me?’ They replied- you were sleeping and we did not like to wake you’. The Prophet prayed for her and had great respect for her as she used to spend her efforts in cleaning the house of Allah and the Prophet’s masjid. May Allah Bless all those who strive to clean his houses of worship.