We know this because the Prophet (peace and blessings of Allah be upon him) held in high regard Umm Mihjan (Allah be pleased with her) who used to clean the masjid.

Duk mun sani cewa kyawun halin Manzon Allah (S.A.W.A) yana daya daga cikin manyan abubuwan da suka ciyar da musulunci gaba.
