then the priest shall command that they wash the thing in which is the disease, and he shall shut it up for another seven days.
This is the law concerning the plague of leprosy in a garment, whether linen or woollen. A leprosy in a garment, with discernible indications of it, the colour changed by it, the garment fretted, the nap worn off, and this in some one particular part of the garment, and increasing when it was shut up, and not to be got out by washing is a...
Commenting on Leviticus 13:47-59
And if the priest look, and, behold, the plague be somewhat dark after the washing of it,.... Is become of a weaker colour, either not quite so green, or not quite so red as it was, or is "contracted", and does not spread itself; see Gill on Lev 13:6; but is rather become less: then he shall rend it out of the garment, or out...
He shall shut it up seven days more - To give time for the spreading of the contagion, if it did exist there; that there might be the most unequivocal marks and proofs that the garment was or was not infected.