Rashi on Leviticus 13:5/רש"י על ויקרא י״ג:ה׳

1בעניו means in its original colour and size.

2שנית … ‎והסגירו HE SHALL SHUT HIM UP … A SECOND TIME — Consequently if it has spread during the first week, he is decidedly unclean, and no further quarantine is required.