Leviticus 12:7 ERV

[7] If the woman cannot afford a lamb, she may bring two doves or two young pigeons. One bird will be for a burnt offering and one for a sin offering. The priest will offer them before the LORD. In this way the priest will make her pure, and she will be clean from the blood of childbirth. These are the rules for a woman who gives birth to a baby boy or a baby girl."