As for the living bird, he shall take it, and the cedar wood, and the scarlet, and the hyssop, and shall dip them and the living bird in the blood of the bird that was killed over the running water: (Leviticus 14:6)
We are not informed as to the meaning of the cedarwood, hyssop, and scarlet. Perhaps the fragrant cedarwood suggested the fragrant incense that was used only in the sanctuary. Hyssop was symbolic of cleansing (Ps. 51:7). The “scarlet” was a tongue or band of twice-dyed wool used in tying the hyssop to the cedar, since both were dipped in the blood.