Abu Qatadah (May Allah be pleased with him) reported:
The Messenger of Allah (ﷺ) was asked about fasting on Mondays. He said, "That is the day on which I was born and the day on which I received Revelation." <b>[Muslim]</b>.
عن أبي قتادة رضي الله عنه أن رسول الله صلى الله عليه وسلم: سئل عن صوم يوم الاثنين فقال:
ذلك يوم ولدت فيه، ويوم بعثت أو أنزل علي فيه
((رواه مسلم)).