Making up missed days or fasting recommended days such as A’ashora on Saturday alone is permissible.

What i need to clarify is fasting a sunnah or nawafil on a Saturday singularly or combined. (ex. Ashura, Day of Arafat, 6 days of shawwal etc..)

Fasting | March 30, 2014 10:24 am
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Sheikh, I wanted to know wether it is compulsory for all members of the family to fast on the day of Eid ul Adha till we get the meat of the sacrificed animal or it is for the person who is doing the sacrifice only that is the husband.
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Does smelling an extremely foul smell invalidate the fast,or if the fasting person has to stay in a stingy environment for a while does it have any impact on the validity of his fast?