LEVITICUS 5:6-7

⁶and he shall bring his guilt offering unto the LORD for his sin which he hath 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.

⁷And if his means suffice not for a lamb, then he shall bring his guilt offering for that wherein he hath sinned, two turtledoves, or two young pigeons, unto the LORD; one for a sin offering, and the other for a burnt offering.