Contradiction with Numbers 22:2-6
These verses show that Balak was afraid of the Israelites and sought Balaam to curse them, whereas in Joshua 24:9, it mentions Balak didn't fight against Israel, but still sought Balaam's curse against them.
Numbers 22:2-6: And Balak the son of Zippor saw all that Israel had done to the Amorites.
Contradiction with Numbers 23:11
In this verse, Balak expresses frustration that Balaam had blessed Israel instead of cursing them, which shows his intent contradicts Joshua 24:9 on Balak's approach towards Israel.
Numbers 23:11: And Balak said unto Balaam, What hast thou done unto me? I took thee to curse mine enemies, and, behold, thou hast blessed [them] altogether.
Contradiction with Numbers 24:10-11
Balak's anger with Balaam for blessing Israel contradicts the passive role implied in Joshua 24:9, reinforcing his antagonistic stance.
Numbers 24:10-11: And Balak's anger was kindled against Balaam, and he smote his hands together: and Balak said unto Balaam, I called thee to curse mine enemies, and, behold, thou hast altogether blessed [them] these three times.