The LORD said to Moses, "Give these instructions to the Israelites:
When a woman becomes pregnant and gives birth to a son, she will be ceremonially unclean for seven days, just as she is defiled during her menstrual period.
On the eighth day, the boy must be circumcised.
Then the woman must wait for thirty-three days until the time of her purification from the blood of childbirth is completed. During this time of purification, she must not touch anything that is holy. And she must not go to the sanctuary until her time of purification is over.
If a woman gives birth to a daughter, she will be ceremonially defiled for two weeks, just as she is defiled during her menstrual period. She must then wait another sixty-six days to be purified from the blood of childbirth."
"When the time of purification is completed for either a son or a daughter, the woman must bring a year-old lamb for a whole burnt offering and a young pigeon or turtledove for a purification offering. She must take her offerings to the priest at the entrance of the Tabernacle.
References for Leviticus 12:6
The priest will then present them to the LORD and make atonement for her. Then she will be ceremonially clean again after her bleeding at childbirth. These are the instructions to be followed after the birth of a son or a daughter."
"If a woman cannot afford to bring a sheep, she must bring two turtledoves or two young pigeons. One will be for the whole burnt offering and the other for the purification offering. The priest will sacrifice them, thus making atonement for her, and she will be ceremonially clean."