Lev Leviticus, chapter Book of Leviticus, chapter 12
[TAZRIA]
Speak unto the Bnei Yisroel, saying, If an isha have conceived, and born a zachar, then she shall be temeiah shivat yamim; according to the yamim of the niddah (menstruation separation) for her infirmity shall she be temeiah (unclean). Luk 2:22