Moreover the people of Ammon crossed over the Jordan to fight against Judah also, against Benjamin, and against the house of Ephraim, so that Israel was severely distressed.
Judges 10:9
Surrounding context
10:8 From that year they harassed and oppressed the children of Israel for eighteen years--all the children of Israel who were on the other side of the Jordan in the land of the Amorites, in Gilead.
10:9 Moreover the people of Ammon crossed over the Jordan to fight against Judah also, against Benjamin, and against the house of Ephraim, so that Israel was severely distressed.
10:10 And the children of Israel cried out to the LORD, saying, "We have sinned against You, because we have both forsaken our God and served the Baals!"