Leviticus 12:1-6

1And the LORD spoke to Moses, saying, 2Speak to the children of Israel, saying, If a woman hath conceived seed, and borne a boy: then she shall be unclean seven days; according to the days of the separation for her infirmity shall she be unclean. 3And in the eighth day the flesh of his foreskin shall be circumcised. 4And she shall then 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 shall bear a girl, then she shall be unclean two weeks, as in her separation: and she shall continue in the blood of her purifying sixty and six days.

6And when the days of her purifying are fulfilled, for a son, or for a daughter, she shall bring a lamb of the first year for a burnt offering, and a young pigeon, or a turtledove, for a sin offering, to the door of the tabernacle of the congregation, to the priest:1