דברי הימים ב, פרק כ״ו, פסוק כ׳

The sudden outbreak of leprosy on a person's forehead carried severe consequences, as this terrible disease mandated complete isolation from society. When this affliction unexpectedly strikes the king inside the Temple, it triggers a dramatic and immediate reaction.

As soon as the High Priest and the other priests notice the mark, they rush the king out in a state of panic and great speed. This extreme urgency stems from the reality that a person with leprosy defiles any space they enter simply by being present. Consequently, even before the mark is officially pronounced impure, the priests are obligated to remove him instantly without a single moment of delay [מלבי״ם].

The king offers no resistance to being hurried away. Instead, he pushes himself to run out just as quickly. He flees on his own accord because he feels and understands instantly that the sudden disease is not a random occurrence. He recognizes it as a direct punishment and strike from God, prompting his desperate escape from the sacred area.