Leviticus 12:4-8

4And she shall continue in the blood of her purifying three and thirty days; she shall touch no hallowed thing, nor come into the sanctuary, until the days of her purifying be fulfilled. 5But if she bear a maid-child, then she shall be unclean two weeks, as in her impurity; and she shall continue in the blood of her purifying threescore and six days.

6And when the days of her purifying are fulfilled, for a son, or for a daughter, she shall bring a lamb a year old for a burnt-offering, and a young pigeon, or a turtle-dove, for a sin-offering, unto the door of the tent of meeting, unto the priest: 7and he shall offer it before Jehovah, and make atonement for her; and she shall be cleansed from the fountain of her blood. This is the law for her that beareth, whether a male or a female. 8And if her means suffice not for a lamb, then she shall take two turtle-doves, or two young pigeons; the 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.