Thematic Bible: Vow

"If his sacrifice accompanies a fulfilled vow or is a voluntary offering, it is to be eaten on the day the offeror brings the sacrifice. Anything left over is to be eaten the next day, but whatever remains uneaten from the meat of the sacrifice by the third day is to be incinerated.

The LORD told Moses, "Tell Aaron, his sons, and all the Israelis that when a person from the house of Israel or from the resident aliens living in Israel brings his offering to the LORD as a whole burnt offering (whether in fulfillment of a promise or a free will offerings), so that he'll be sure to be accepted, he is to offer a male without defect from the bulls, the lambs, and the goats. read more.
However, whatever has a defect is not to be offered, because it won't be acceptable for you. "If a person brings a peace offering sacrifice to the LORD to fulfill a vow or a free will offering from the herd or the flock, it is to be sound in order to be accepted, without any defect in it. You are not to bring to the LORD an offering that is blind, fractured, mutilated, or infected with ulcers, scurvy, or scales. You are not to present any of them as an offering made by fire on the altar for the LORD. "You may offer a bull or lamb that has one limb longer than the other or that is stunted as a free will offering, but it's not acceptable in fulfillment of a promise. You are not to bring to the LORD an animal that has been emasculated, crushed, torn, or cut apart. You are not to practice this in your land. A resident alien is not to offer as food to your God any of these items, because they are afflicted with ritual corruption due to their defects. They're not acceptable for you."

"When you make a vow to the LORD your God, don't delay paying it, because the LORD your God will certainly demand payment from you, and then you will be guilty of sin. But if you refrain from making a vow, then you won't be guilty. Be sure you do whatever you promise, because you have given your word voluntarily to the LORD your God.