Leviticus 12:8

8 But if she cannot afford a lamb, she is to bring two doves or two young pigeons, one for a burnt offering and the other for a sin offering. In this way the priest will make atonement for her, and she will be clean.’ ”

Read Leviticus 12:8 Using Other Translations

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.
And if she cannot afford a lamb, then she shall take two turtledoves or two pigeons,one for a burnt offering and the other for a sin offering. And the priest shall make atonement for her, and she shall be clean.'"
“If a woman cannot afford to bring a lamb, she must bring two turtledoves or two young pigeons. One will be for the burnt offering and the other for the purification offering. The priest will sacrifice them to purify her, and she will be ceremonially clean.”