Leviticus 27:31 in the World English Bible
If a man redeems anything of his tithe, he shall add a fifth part to it.
Context
30 And all the tithe of the land, whether of the seed of the land, or of the fruit of the tree, is the LORD’s: it is holy unto the LORD.
31 And if a man will at all redeem ought of his tithes, he shall add thereto the fifth part thereof.
32 And concerning the tithe of the herd, or of the flock, even of whatsoever passeth under the rod, the tenth shall be holy unto the LORD.