Leviticus 14
49 Ref And in order to make the house clean, let him take two birds and cedar-wood and red thread and hyssop;
50 And put one of the birds to death in a vessel of earth over flowing water;
51 Ref And take the cedar-wood and the hyssop and the red thread and the living bird and put them in the blood of the dead bird and in the flowing water, shaking it over the house seven times.
52 And he will make the house clean with the blood of the bird and the flowing water and with the living bird and with the cedar-wood and the hyssop and the red thread.