1 Samuel 21:5

⁵ And David answered the priest, and said unto him, Of a truth women have been kept from us about these three days; when I came out, the vessels of the young men were holy, though it was but a common journey; how much more then to-day shall their vessels be holy?

Hot

When contrasted to being cold, as in Revelation 3:15, being 'Hot' signifies being in a state of spiritual love.

In other places, e.g. where someone's temper is "hot", it can mean evil that's stemming from false doctrine, as in Deuteronomy 19:6.