Leviticus 22:14
"'If a man eat of the hallowed things unwittingly, he shall put the fifth part thereunto, and make good unto the priest the hallowed thing.
Leviticus 27:13
And if he will buy it again, let him give the fifth part more to that it was set at.
Leviticus 27:15
If he that sanctified it will redeem his house, let him give the fifth part of the money that it was judged at thereto, and it shall be his.
Leviticus 5:15-19
"When a soul trespasseth and sinneth through ignorance in any of the holy things of the LORD, he shall bring for his trespass unto the LORD, a ram without blemish out of the flock valued at two sicles after the holy sicle, for a trespass offering.