" 'When the days of her purification for a son or daughter are over,1 she is to bring to the priest at the entrance to the Tent of Meeting a year-old lamb2 for a burnt offering and a young pigeon or a dove for a sin offering.3
References for Leviticus 12:6
He shall offer them before the LORD to make atonement for her, and then she will be ceremonially clean from her flow of blood. " 'These are the regulations for the woman who gives birth to a boy or a girl.
If she cannot afford a lamb, she is to bring two doves or two young pigeons,4 one for a burnt offering and the other for a sin offering.5 In this way the priest will make atonement for her, and she will be clean.6' "
References for Leviticus 12:8