Leviticus 14:4-6

Amplified Bible

⁴ then the priest shall give orders to take two live clean birds and cedar wood and scarlet string and ^[a]hyssop for the one to be cleansed.^{(A) 5} Next the priest shall order that one of the birds be killed [as a sacrifice] in an earthenware container over [fresh] ^[b]running water. ⁶ As for the live bird, he shall take it together with the cedar wood and the scarlet string and the hyssop, and shall dip them and the live bird in the blood of the bird sacrificed over the running water.