Leviticus 5:4-6

New King James Version

⁴ ‘Or if a person ^[a]swears, speaking thoughtlessly with his lips ^(A)to do evil or ^(B)to do good, whatever it is that a man may pronounce by an oath, and he is unaware of it—when he realizes it, then he shall be guilty in any of these matters.

⁵ ‘And it shall be, when he is guilty in any of these matters, that he shall ^(C)confess that he has sinned in that thing; ⁶ and he shall bring his trespass offering to the Lord for his sin which he has committed, a female from the flock, a lamb or a kid of the goats as a sin offering. So the priest shall make atonement for him concerning his sin.