I doubt that he said anything like this.
Kindly follow the link given: https://m.youtube.com/watch?v=k5Qu9iJ-1W4

I just want to make sure what I heard is correct. Abu Mussab Akkari said in a lecture that one should avoid fasting on both Fridays and Saturdays, is this correct? He mentioned, if you intend to fast the 13th, 14th, and 15th of the month, and it falls on a Friday or Saturday you should not fast those days.

Fasting |