Leviticus 5:7
And if he be not able to bring a lamb, then he shall bring for his trespass, which he has committed, two turtledoves, or two young pigeons, to the LORD; one for a sin offering, and the other for a burnt offering.
Nave's Topical Index—AKJV

Leviticus 12:8
And if she be not able to bring a lamb, then she shall bring two turtles, or two young pigeons; the one for the burnt offering, and the other for a sin offering: and the priest shall make an atonement for her, and she shall be clean.
Nave's Topical Index—AKJV

Leviticus 14:21,22
And if he be poor, and cannot get so much; then he shall take one lamb for a trespass offering to be waved, to make an atonement for him, and one tenth deal of fine flour mingled with oil for a meat offering, and a log of oil;
Nave's Topical Index—AKJV