Vows of Things Corrupt or Blemished an Insult to God
Source: TTT
Leviticus 22:23
You may present as a freewill offering an ox or sheep that has a deformed or stunted limb, but it is not acceptable in fulfillment of a vow.
Malachi 1:14
“But cursed is the deceiver who has an acceptable male in his flock and vows to give it, but sacrifices a defective animal to the Lord. For I am a great King,” says the LORD of Hosts, “and My name is to be feared among the nations.