TSK · Leviticus 15:29

It happened on the eighth day, that Moses called Aaron and his sons, and the elders of Israel;

If she cannot afford a lamb, then she shall take two turtledoves, 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.'"

On the eighth day he shall bring two turtledoves or two young pigeons to the priest, to the door of the Tent of Meeting.