Contradiction with Deuteronomy 2:9
Contradicts 2 Chronicles 20:10 as Deuteronomy 2:9 describes God's command to not harass or contend with the Moabites, whereas 2 Chronicles 20:10 discusses how the Moabites were coming against Israel without retaliation from God.
Deuteronomy 2:9: And the LORD said unto me, Distress not the Moabites, neither contend with them in battle: for I will not give thee of their land [for] a possession; because I have given Ar unto the children of Lot [for] a possession. [Distress...: or, Use no hostility against Moab]
Contradiction with Deuteronomy 2:19
Instructs Israelites not to harass the Ammonites, implying God's protection over them, while 2 Chronicles 20:10 highlights that these protected groups are now threatening Israel.
Deuteronomy 2:19: And [when] thou comest nigh over against the children of Ammon, distress them not, nor meddle with them: for I will not give thee of the land of the children of Ammon [any] possession; because I have given it unto the children of Lot [for] a possession.
Contradiction with Judges 11:15-18
Elaborates on Israel not taking land from Moabites and Ammonites, contrasting with 2 Chronicles 20:10 where Israel faces aggression from them despite past peaceful actions.
Judges 11:15-18: And said unto him, Thus saith Jephthah, Israel took not away the land of Moab, nor the land of the children of Ammon:
Contradiction with Joshua 24:9-10
States that God did not allow Balaam to curse Israelites against Moabite conflict, seeming to contradict 2 Chronicles 20:10 where God is seemingly not preventing their aggression.
Joshua 24:9-10: Then Balak the son of Zippor, king of Moab, arose and warred against Israel, and sent and called Balaam the son of Beor to curse you: