What does Deuteronomy 9:3 mean?

Know therefore this day, that Jehovah thy God is he who goeth over before thee as a devouring fire; he will destroy them, and he will bring them down before thee: so shalt thou drive them out, and make them to perish quickly, as Jehovah hath spoken unto thee.

Understand therefore this day, that the Lord thy God is he which goeth over before thee; as a consuming fire he shall destroy them, and he shall bring them down before thy face: so shalt thou drive them out, and destroy them quickly, as the Lord hath said unto thee.

Know therefore this day, that Jehovah thy God is he who goeth over before thee as a devouring fire; he will destroy them, and he will bring them down before thee: so shalt thou drive them out, and make them to perish quickly, as Jehovah hath spoken unto thee.

Be certain then today that it is the Lord your God who goes over before you like an all-burning fire; he will send destruction on them, crushing them before you; and you will send them in flight, putting an end to them quickly, as the Lord has said.

and thou hast known to-day, that Jehovah thy God <FI>is<Fi> He who is passing over before thee--a fire consuming; He doth destroy them, and He doth humble them before thee, and thou hast dispossessed them, and destroyed them hastily, as Jehovah hath spoken to thee.

Thou shalt know therefore this day that the Lord thy God himself will pass over before thee, a devouring and consuming fire, to destroy and extirpate and bring them to nothing before thy face quickly, as he hath spoken to thee.

Know then this day, that Jehovah thyGod is he that goeth over before thee, a consuming fire; he will destroy them, and he will cast them down before thee, and thou shalt dispossess them and cause them to perish quickly, as Jehovah hath said unto thee.