Leviticus 5:7

4 Or if anyone swear rashly with his lips to do evil, or to do good, whatever it be that a man shall utter rashly with an oath, and it be hid from him; when he knows of it, then he shall be guilty in one of these [things].

5 It shall be, when he shall be guilty in one of these [things], that he shall confess that in which he has sinned:

6 and he shall bring his trespass-offering to Yahweh for his sin which he has sinned, a female from the flock, a lamb or a goat, for a sin-offering; and the priest shall make atonement for him as concerning his sin.

7 If his means aren`t sufficient for a lamb, then he shall bring his trespass-offering for that in which he has sinned, two turtle-doves, or two young pigeons, to Yahweh; one for a sin-offering, and the other for a burnt offering.

8 He shall bring them to the priest, who shall offer that which is for the sin-offering first, and wring off its head from its neck, but shall not divide it apart:

9 and he shall sprinkle of the blood of the sin-offering on the side of the altar; and the rest of the blood shall be drained out at the base of the altar: it is a sin-offering.

10 He shall offer the second for a burnt offering, according to the ordinance; and the priest shall make atonement for him as concerning his sin which he has sinned, and he shall be forgiven.