Leviticus 14:2-6

“This shall be the law of the person with leprosy on the day of his cleansing. Now he shall be brought to the priest;

and the priest shall go out to a place outside of the camp. Then the priest shall look, and if the leprous infection has been healed in the person with leprosy,

then the priest shall give orders to take two live clean birds, cedar wood, a scarlet string, and hyssop for the one who is to be cleansed.

The priest shall also give orders to slaughter the one bird in an earthenware vessel over running water.

As for the live bird, he shall take it together with the cedar wood, the scarlet string, and the hyssop, and shall dip them and the live bird in the blood of the bird that was slaughtered over the running water.