Leviticus 13:23

But if the bright spot stay in his place, and spread not, it is a burning boil; and the priest shall pronounce him clean.

Cross-references

In Leviticus 13:26, a different diagnostic outcome is given—quarantine instead of clean—contrasting with the clean declaration here.

Leviticus 13:34 also examines a healed spot that does not spread—parallel procedure leading to a clean pronouncement, same logic here.