Leviticus 12:4-6

New Revised Standard Version Catholic Edition

⁴ Her time of blood purification shall be thirty-three days; she shall not touch any holy thing, or come into the sanctuary, until the days of her purification are completed. ⁵ If she bears a female child, she shall be unclean two weeks, as in her menstruation; her time of blood purification shall be sixty-six days.

⁶ When the days of her purification are completed, whether for a son or for a daughter, she shall bring to the priest at the entrance of the tent of meeting a lamb in its first year for a burnt offering, and a pigeon or a turtledove for a sin offering.