Leviticus 27:31

If a man wishes to redeem part of his tithe, he must add a fifth to its value.

And if a man will at all redeem ought of his tithes, he shall add thereto the fifth part thereof.

If a man redeems anything of his tithe, he shall add a fifth part to it.

And if a man will redeem aught of his tithe, he shall add unto it the fifth part thereof.