Leviticus 5:7-10

7“But aif he cannot afford a lamb, then he shall bring to the  Lord as his compensation for the sin that he has committed two bturtledoves or two pigeons
Septuagint  two young pigeons; also verse 11
one for a sin offering and the other for a burnt offering.
8He shall bring them to the priest, who shall offer first the one for the sin offering. He shall dwring its head from its neck ebut shall not sever it completely, 9and he shall sprinkle some of the blood of the sin offering on the side of the altar, while fthe rest of the blood shall be drained out gat the base of the altar; it is a sin offering. 10Then he shall offer the second for a burnt offering according to the rule. hAnd the priest shall make atonement for him for the sin that he has committed, and he shall be forgiven.

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