Rather, "And the clothing in which there is a stroke of leprosy, whether the stroke is in clothing of wool or in clothing of linen; or in yarn for warp or in yarn for woof, either for linen clothing or for woolen clothing; or in a skin of leather or in any article made of leather."

Whether it be in the warp, or woof, of linen, or of woollen,.... When these are woven and mixed together, it seems difficult, if not impossible, to judge whether the plague of leprosy was in the one or in the other; one would think it should be unavoidably in both; wherefore Castalio renders the words, whether "in the outer part of it, or in the inner"; in the outside or inside, or what we call the right side or the wrong side of the cloth: but to me it seems that the warp and woof, whether of linen or woollen, are here distinguished not only from garments made of them, but from the cloth itself, of which they are made, and even to be considered before they are wrought together in the loom; and, according to the Jews, when upon the spindle (m):
whether in a skin, or anything made of skin; that is, whether in unwrought skin, which is not made up in anything, or in anything that is made of skins, as tents, bottles, &c. but skins of fishes, according to the Jewish traditions, are excepted; for so they say (n), sea skins, i.e. skins of fishes, are not defiled by plagues (of leprosy); for which the commentators (o) give this reason, that as wool and linen are of things which grow out of the earth, so must the skins be; that is, of such animals as live by grass, that springs out of the earth; but if anything was joined unto them, which grew out of the earth, though but a thread, that received uncleanness, it was defiled.
(m) Misn. Negaim, c. 11. sect. 8. (n) Misn. Negaim, c. 11. sect. 1. (o) Maimon. & Bartenora in Misn. Edait, c. 7. sect. 8.

In the warp or woof - A learned man renders it in the outside, or in the inside of it. If the signification of these words be doubtful now, as some of those of the living creatures and precious stones are confessed to be, it is not material to us, this law being abolished; it sufficeth that the Jews understood these things by frequent experience.