Is it permissible for a Muslim who benefits from a sheep vowed to Allah to benefit from its offspring or to use its offspring as an Udhiyah (sacrifice)?

The offspring of a specific ewe designated for a vow and its descendants are subject to the same ruling as the vowed mother; that is, they become part of the vow themselves. The one who made the vow is not permitted to use them for anything other than what the mother was vowed for, whether the mother was pregnant at the time of designation or became pregnant thereafter. If the mother dies, the ruling on the offspring remains as it was, and it must be slaughtered at the same time the mother would have been slaughtered.