9 And the Ammonites crossed the Jordan to fight also against Judah and against Benjamin and against the house of E'phraim; so that Israel was sorely distressed.

Matthew Henry's Commentary on Judges 10:9

Commentary on Judges 10:6-9

(Read Judges 10:6-9)

Now the threatening was fulfilled, that the Israelites should have no power to stand before their enemies, Leviticus 26:17,37. By their evil ways and their evil doings they procured this to themselves.