Is it obligatory to fulfill a vow to slaughter a sheep in celebration of pregnancy, given that the original vow was made for a specific month in which pregnancy did not occur, and then the questioner became pregnant in a month for which she did not intend the vow? And can its fulfillment be postponed until after childbirth?
Vowing is not recommended and does not alter Allah's decree and destiny. As long as the pregnancy did not occur in the month you specified for the vow, nothing is binding upon her; this is because a vow is not contracted by intention, but rather requires an utterance indicating commitment.
Summarized from the full answer at Ftawy · reviewed Sep 2, 2026
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