Leviticus 12:2-4

²Speak thou to the sons of Israel, and thou shalt say to them, If a woman, when she hath received seed, childeth a knave child, she shall be unclean by seven days, by the days of her separating of corruptible blood, that runneth from her by months;

³and the young child shall be circumcised in the eighth day.

⁴Soothly she shall dwell three and thirty days in the blood of her purifying; she shall not touch any holy thing, neither she shall enter into the saintuary, till the days of her cleansing be ful filled.