Priests: Services of Purifying the Unclean
Source: TTT
Leviticus 15:30, 31
The priest is to sacrifice one as a sin offering and the other as a burnt offering. In this way the priest will make atonement for her before the LORD for her unclean discharge. / You must keep the children of Israel separate from their uncleanness, so that they do not die by defiling My tabernacle, which is among them.