'Threads' in the Bible

If it is in the threads of the linen or of the wool, or in leather, or in anything made of skin;

If there are red or green marks on the clothing, or on the leather, or in the threads of the cloth, or in anything made of skin, it is the leper's disease: let the priest see it.

And he is to see the mark on the seventh day; if the mark is increased in the clothing, or in the threads of the material, or in the leather, whatever the leather is used for, it is the disease biting into it: it is unclean.

And if the priest sees that the mark is less bright after the washing, then let him have it cut out of the clothing or the leather or from the threads of the material:

And if the mark is still seen in the clothing or in the threads of the material or in the leather, it is the disease coming out: the thing in which the disease is will have to be burned with fire.