Leviticus 27:30-32

‘Now all the tithe of the land, of the seed of the land or of the fruit of the tree, is the LORD’S; it is holy to the LORD. If, therefore, someone should ever want to redeem part of his tithe, he shall add to it a fifth of it. For every tenth part of herd or flock, whatever passes under the rod, the tenth one shall be holy to the LORD.