Sunan Abi Dawud 2452
سنن أبي داود#2452Da'ifNarrated Umm Salamah, Ummul Mu'minin: Hunaydah al-Khuza'i reported on the authority of her mother who said: I entered upon Umm Salamah and asked her about fasting. She said: The Messenger of Allah (ﷺ) used to command me to fast three days every month beginning with Monday or Thursday
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniMunkar
Muhammad Muhyi Al-Din Abdul HamidMunkar
Zubair Ali ZaiIsnaad Sahih
In-book reference: 14:140