Hyssop (Origanum syriacum)
"Then a man who is ceremonially clean is to take some hyssop, dip it in the water and sprinkle the tent and all the furnishings and the people who were there.
Hyssop, or Ezov as it is known in Hebrew, is recorded throughout the Bible. It is known for its purifying properties, both spiritual and physical. If someone came in contact with the dead, they would become spiritually unclean, along with any objects that were also touched. Hyssop formed part of a special mixture together with the ashes of the Red Heifer and spiritually cleansed anyone rendered impure through the sprinkling of the mixture upon them.
“Then the kohen shall order, and the person to be cleansed shall take two live, clean birds, a cedar stick, a strip of crimson [wool], and hyssop.”
Those affected with leprosy would also benefit from the cleansing properties of hyssop which played an integral part in the cleansing formula to be administered by the High Priest.
As mentioned in Kings, hyssop grew out of the walls in the Holy Land, providing an accessible source for this wonderful herb. “and to the hyssop that springs out of the wall”
And who better to confirm the cleansing properties of hyssop than King David himself when he implored God to purify him?
"Cleanse me with hyssop, and I will be clean; wash me, and I will be whiter than snow."