Moses compares Yahweh's anger to someone starting a fire. This emphasizes Yahweh's power to destroy what makes him angry. This can be stated in active form. Alternate translation: "Yahweh will kindle his anger against you" or "Then Yahweh will become very angry with you" (See: [[rc://en/ta/man/translate/figs-metaphor]] and [[rc://en/ta/man/translate/figs-activepassive]])