Vayikra 13:53-55

Orthodox Jewish Bible

⁵³ And if the kohen shall examine, and, hinei, the nega be not spread in the garment, either in the warp, or in the woof, or in anything of leather,

⁵⁴ Then the kohen shall command that they wash the thing wherein the nega is, and he shall quarantine it another shivat yamim;

⁵⁵ And the kohen shall examine the nega, after that it is washed; and, hinei, if the nega has not changed its appearance, and the nega be not spread, it is tamei; thou shalt burn it in the eish; whether the eating away hath brought bareness in the front or back.