(56) Behold, the plague be somewhat dark.--But if after the washing the priest finds that the suspicious colour has changed from green or red into a darkish colour, and the spot has contracted, he is to cut out the affected spot and burn it, and declare the garment itself clean. (See Leviticus 13:6.)

13:47-59 The garment suspected to be tainted with leprosy was not to be burned immediately. If, upon search, it was found that there was a leprous spot, it must be burned, or at least that part of it. If it proved to be free, it must be washed, and then might be used. This also sets forth the great evil there is in sin. It not only defiles the sinner's conscience, but it brings a stain upon all he has and all that he does. And those who make their clothes servants to their pride and lust, may see them thereby tainted with leprosy. But the robes of righteousness never fret, nor are moth-eaten.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 Leviticus 13:6; but is rather become less:

then he shall rend it out of the garment, or out of the skin, or out of the warp, or out of the woof; that is, that piece which has the plague in it, and burn it, as Jarchi says; that so the whole may not be lost, which is otherwise pure, and clean, and free from any infection. The manner of expression confirms what I have observed on Leviticus 13:48; that the warp and woof are considered as separate things, and as before they are wove together, or wrought into one garment. This rending out may denote the denying of ungodliness and worldly lusts, the parting with right eye and right hand sins, and having no fellowship with the unfruitful works of darkness.