Leviticus 14:5-7

⁵The priest will order one of the birds to be killed over a clay pot filled with fresh water.

⁶He will take the live bird together with the cedar wood, crimson thread, and hyssop, and dip them in the blood of the bird that was killed over the fresh water.

⁷He will use the blood to sprinkle seven times the person being made clean of the skin disease. Then the priest will declare them clean and let the live bird fly away.