Sprinkle me with water and I will be pure; wash me and I will be whiter than snow.

Then he is to take two birds, a piece of cedar wood, a scrap of crimson fabric, and some twigs of hyssop to decontaminate the house,

And the priest must take cedar wood, hyssop, and scarlet wool and throw them into the midst of the fire where the heifer is burning.

then the priest will command that two live clean birds, a piece of cedar wood, a scrap of crimson fabric, and some twigs of hyssop be taken up for the one being cleansed.

So he is to decontaminate the house with the blood of the bird, the fresh water, the live bird, the piece of cedar wood, the twigs of hyssop, and the scrap of crimson fabric,

Take a branch of hyssop, dip it in the blood that is in the basin, and apply to the top of the doorframe and the two side posts some of the blood that is in the basin. Not one of you is to go out the door of his house until morning.

Then he is to take the live bird along with the piece of cedar wood, the scrap of crimson fabric, and the twigs of hyssop, and he is to dip them and the live bird in the blood of the bird slaughtered over the fresh water,

He must then take the piece of cedar wood, the twigs of hyssop, the scrap of crimson fabric, and the live bird, and dip them in the blood of the slaughtered bird and in the fresh water, and sprinkle the house seven times.

Then a ceremonially clean person must take hyssop, dip it in the water, and sprinkle it on the tent, on all its furnishings, and on the people who were there, or on the one who touched a bone, or one killed, or one who died, or a grave.

He produced manuals on botany, describing every kind of plant, from the cedars of Lebanon to the hyssop that grows on walls. He also produced manuals on biology, describing animals, birds, insects, and fish.