Any man given completely to the Lord may not be got back.

Vows To The Lord

Say to the children of Israel, If a man makes a special oath, you will give your decision as to the value of the persons for the Lord.
Leviticus 27:2

What is once devoted to the Lord IS His forever by a perpetual covenant.
Any man given completely to the Lord may not be got back: he is certainly to be put to death.
Leviticus 27:29

And every tenth part of the land, of the seed planted, or of the fruit of trees, is holy to the Lord.
Leviticus 27:30