What is the ruling on one who vows to fast three days of every month but is unable to do so?

The questioner : A man made a vow to fast the white days of every month, but he suffers from excessive thirst. What is the ruling if he is unable to do so?

The Shaykh : Yes, if a person vows to fast three days of every month, it is obligatory for him to fast them, because fasting is an act of obedience, and the Prophet (peace and blessings be upon him) said: . However, it is not necessary for them to be consecutive if he did not stipulate that they be consecutive. There is no harm in fasting one day at the beginning of the month, one day in the middle, and one day at the end, and this will make it easier for him. I do not think that anyone is unable to fast one day in a week. Yes.