Leviticus 14:4-8

4the priest will order someone to get two living, clean birds, some cedar wood, red yarn, and a hyssop sprig to use for the cleansing.

5Then the priest will order someone to kill one bird over a clay bowl containing fresh water.

6The priest will take the living bird, the cedar wood, the red yarn, and the hyssop sprig and dip them and the living bird in the blood of the bird that was killed over the fresh water.

7He will sprinkle the blood seven times on the one to be cleansed and will declare that person clean. Then he will let the living bird fly away into the open country.

8“The one to be cleansed must wash his clothes, shave off all his hair, and wash. Then he will be clean. After that he may go into the camp. However, for seven days he will live outside his tent.