Judges 10:9
Moreover the children of Ammon passed over Jordan to fight also against Judah, and against Benjamin, and against the house of Ephraim; so that Israel was sore distressed.
Cross-references
Judges 3:12 shows the same cycle of Israel doing evil and being oppressed by an enemy, reinforcing the pattern seen in the Ammonite invasion here.
Judges 3:13 describes Ammonites joining Moab to attack Israel, paralleling the Ammonite threat in this verse.
Judges 6:3-5 recounts a similar invasion by eastern peoples causing great distress, a recurring pattern of enemy oppression in Judges.
Judges 2:15 uses the same 'severely distressed' phrase to describe the pattern of divine judgment for disobedience, which is fulfilled here.
Judges 11:5 shows the elders of Gilead seeking Jephthah in direct response to the Ammonite attack described here, continuing the narrative.
2 Chronicles 20:1 mentions Ammonites making war on Jehoshaphat, the same enemy as in this verse.
Deuteronomy 28:65 promises great distress as a curse for disobedience, which is realized in Israel's distress here.