Trespass offering: Consisted of Two Turtle Doves by Those Unable to Bring a Lamb
Source: TTT
Leviticus 5:7–10
If, however, he cannot afford a lamb, he may bring to the LORD as restitution for his sin two turtledoves or two young pigeons—one as a sin offering and the other as a burnt offering. / He is to bring them to the priest, who shall first present the one for the sin offering. He is to twist its head at the front of its neck without severing it; / then he is to sprinkle some of the blood of the sin offering on the side of the altar, while the rest of the blood is drained out at the base of the altar. It is a sin offering.