See Plants. Hyssop is mentioned in Exodus 12:22 in a text which relates the events which that took place before the last plague. It is stated there that in the name of God Moses told the congregation that they were to dip hyssop into the sacrificial blood of a sheep, so as to mark out the houses of the Israelites. We are told that this enabled God to protect the homes of the Israelites when he unleashed the last plague.
Hyssop is a wild marjoram, which is cultivated as a spice.
Habitat: Sinai desert.