Contradiction with Exodus 23:31
Promises to drive out the inhabitants gradually, whereas Numbers 21:3 depicts a sudden victory over the Canaanites.
Exodus 23:31: And I will set thy bounds from the Red sea even unto the sea of the Philistines, and from the desert unto the river: for I will deliver the inhabitants of the land into your hand; and thou shalt drive them out before thee.
Contradiction with Deuteronomy 7:22
Describes a gradual process of driving out nations which contrasts the immediate destruction in Numbers 21:3.
Deuteronomy 7:22: And the LORD thy God will put out those nations before thee by little and little: thou mayest not consume them at once, lest the beasts of the field increase upon thee. [put...: Heb. pluck off]
Contradiction with Judges 2:21-23
States that God did not drive out the nations quickly, unlike the quick defeat in Numbers 21:3.
Judges 2:21-23: I also will not henceforth drive out any from before them of the nations which Joshua left when he died:
Contradiction with Joshua 13:1-6
Mentions that many nations still remained, implying incomplete conquest, which contradicts Numbers 21:3's complete destruction.
Joshua 13:1-6: Now Joshua was old [and] stricken in years; and the LORD said unto him, Thou art old [and] stricken in years, and there remaineth yet very much land to be possessed. [to...: Heb. to possess it]
Contradiction with Joshua 23:5
Promises God will drive people out "before you" whereas Numbers 21:3 is a recounting of past conquest.
Joshua 23:5: And the LORD your God, he shall expel them from before you, and drive them from out of your sight; and ye shall possess their land, as the LORD your God hath promised unto you.
Paradox #1
The contradiction in Numbers 21:3 might stem from the biblical account of God assisting the Israelites in destroying a group of people, which raises questions about the morality of divine command and the ethics of violence. This can be seen as conflicting with the broader idea of a benevolent and loving deity.