Answered by Mufti Mohammed Tosir Miah
Assalamualikum. Mufti saab, My friend had vowed that if her wish is fulfilled she will fast for a particular time period say for example from 1st jan to 7th jan but for some reason she could not keep her fasts. Please tell what is rulling for keeping vowed fasts and does she have to give some kaffarah also.
One should try to fast on the days he intended, however, if one was unable to fast on those specific days, he should do qadha on the other days and his vow would be fulfilled. He does not have to keep the qadha fast continuously. Qadha of the fast is necessary. There is no need to give kaffarah. (Fatawa Rahimiyah p.27 v.9 & Durre Mandhuud p.311 v.5)
Only Allah Knows Best
Mohammed Tosir Miah
Darul Ifta Birmingham.