Leviticus 22:14
And if a man eat of a holy thing unwittingly, then he shall add the fifth part of it unto it, and shall give it unto the priest with the holy thing.
Leviticus 27:13
But if he will at all redeem it, then he shall add a fifth part thereof unto your valuation.
Leviticus 27:15
And if he that dedicates it will redeem his house, then he shall add the fifth part of the money of your valuation unto it, and it shall be his.
Leviticus 5:15-19
If a soul commits a trespass, and sins through ignorance, in the holy things of the LORD; then he shall bring for his trespass unto the LORD a ram without blemish out of the flocks, with your valuation by shekels of silver, after the shekel of the sanctuary, for a trespass offering: