Deuteronomy 9:3

1 Hear, O Israel: Today you are about to cross the Jordan to go in and dispossess nations greater and stronger than you, with large cities fortified to the heavens.

2 The people are strong and tall, the descendants of the Anakim. You know about them, and you have heard it said, “Who can stand up to the sons of Anak?”

But understand that today the LORD your God goes across ahead of you as a consuming fire; He will destroy them and subdue them before you. And you will drive them out and annihilate them swiftly, as the LORD has promised you.

4 When the LORD your God has driven them out before you, do not say in your heart, “Because of my righteousness the LORD has brought me in to possess this land.” Rather, the LORD is driving out these nations before you because of their wickedness.

5 It is not because of your righteousness or uprightness of heart that you are going in to possess their land, but it is because of their wickedness that the LORD your God is driving out these nations before you, to keep the promise He swore to your fathers, to Abraham, Isaac, and Jacob.

Do read the surrounding verses too, because the context often says more than a single verse.

Compare

BSB
But understand that today the LORD your God goes across ahead of you as a consuming fire; He will destroy them and subdue them before you. And you will drive them out and annihilate them swiftly, as the LORD has promised you.
KJV
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.
WEB
Know therefore today that the LORD your God is he who goes over before you as a devouring fire. He will destroy them and he will bring them down before you. So you shall drive them out and make them perish quickly, as the LORD has spoken to you.
ASV
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.
DARBY
Know then this day, that Jehovah thy God 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.
BLB
And you shall know today that YHWH your God [is] He who is passing over before you [as] a consuming fire; He will destroy them, and He will bring them down before you. And you shall drive them out and destroy them quickly, as YHWH has spoken to you.
ÅB
Så skal du da vite idag at Herren din Gud, han som går fram foran deg som en fortærende ild, han skal ødelegge dem, og han skal ydmyke dem for deg, så du skal drive dem bort og tilintetgjøre dem i hast, slik som Herren har sagt til deg.
OTB
Men forstå i dag at Herren din Gud går foran deg som en fortærende ild. Han vil ødelegge dem og underkue dem foran deg. Så du skal drive dem ut og utslette dem raskt, slik som Herren har lovet.
B1930
Så skal du da vite idag at Herren din Gud, han som går frem foran dig som en fortærende ild, han skal ødelegge dem, og han skal ydmyke dem for dig, så du skal drive dem bort og tilintetgjøre dem i hast, således som Herren har sagt til dig.

Study notes (Tyndale)

Original text and word study

Cross references