Leviticus 14:5-7

⁵Then the priest will command that one of the birds be killed while it is being held over a clay pot containing water from a spring.

⁶Then the priest will dip the other bird, along with the cedar wood, the scarlet/red yarn and the hyssop, into the blood of the bird that was killed.

⁷Then he must sprinkle some of the blood on the person who was healed; he must sprinkle it on him seven times. Then he will declare that the person is permitted to be with other people again. And the priest will release the other bird and allow it to fly away.