Is it permissible to combine the sacrifice of a vowed sheep and the Eid sacrifice in a single sheep, and in this case, which should be slaughtered first?

This conditional vow is disliked, but it must be fulfilled for the man's recovery from his illness, and due to the Prophet's (peace be upon him) saying: "Whoever vows to obey Allah, let him obey Him." It is not permissible to combine the sacrifice (Udhiyah) and the vow in one animal. Therefore, the vowed animal must be slaughtered immediately, and then the Udhiyah, if feasible.