Leviticus

And 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, unto the door of the tabernacle of the congregation, unto the priest:

And on the eighth day he shall bring two turtles, or two young pigeons, to the priest, to the door of the tabernacle of the congregation:

And it came to pass on the eighth day, that Moses called Aaron and his sons, and the elders of Israel;

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 on the eighth day he shall take to him two turtledoves, or two young pigeons, and come before the Lord unto the door of the tabernacle of the congregation, and give them unto the priest: