NET

51 He must then examine the infection on the seventh day. If the infection has spread in the garment, or in the warp, or in the woof, or in the leather—whatever the article into which the leather was made—the infection is a malignant disease. It is unclean.

Darby

51 And he shall see the sore on the seventh day: if the sore have spread in the garment, either in the warp or in the woof, or in a skin, in any work that may be made of skin, the sore is a corroding leprosy: it is unclean.

KJV

51 And he shall look on the plague on the seventh day: if the plague be spread in the garment, either in the warp, or in the woof, or in a skin, [or] in any work that is made of skin; the plague [is] a fretting leprosy; it [is] unclean.