Leviticus 5:4-6

CAB(i) 4 That unrighteous soul, which determines with his lips to do evil or to do good according to whatsoever a man may determine with an oath, and it shall have escaped his notice, and he shall afterwards know it, and so he should sin in one of these things; 5 then shall he declare his sin in the things in which he has sinned by that sin. 6 And he shall bring for his transgressions against the Lord, for his sin which he has sinned, a ewe lamb of the flock, or a kid of the goats, for a sin-offering; and the priest shall make an atonement for him for his sin which he has sinned, and his sin shall be forgiven him.