Mark 9:49
Everyone will be salted with fire — the cryptic saying connects fire (just mentioned in the hell imagery) to salt (about to be mentioned). Salt in the ancient world was a preservative and a purifying agent; fire was both purifying and destructive. Everyone will be salted with fire may mean every person will undergo the purifying fire of suffering and testing (which preserves them for the kingdom) or may refer to the fire of judgment. The ambiguity is likely deliberate: the same fire purifies those who belong to the kingdom and destroys those who do not.