John Gill's Bible Commentary Ver. 9. Moreover, the children of Ammon passed over Jordan , etc.] Not content with the oppression of the tribes on the other side Jordan, which had continued eighteen years, they came over Jordan into the land of Canaan to ravage that, and bring other of the tribes into subjection to them, particularly the three next mentioned, which lay readiest for them, when they were come over Jordan: to fight also against Judah, and against Benjamin, and against the house of Ephraim who lay to the south and the southeast of the land of Canaan, and were the first the Ammonites had to fight with and subdue, when they had crossed Jordan to the east of it: so that Israel was sore distressed ; by the Ammonites in the east, threatening those three tribes, mentioned, and the Philistines on the west, who gave disturbance to the tribes that lay nearest them, as Asher, Zebulun, Naphtali, Issachar, and Dan; and this distress was begun the same year in different parts, by different enemies.
Matthew Henry Commentary
Verses 6-9 - Now the threatening was fulfilled, that the Israelites should have n power to stand before their enemies, Le 26:17, 37. By their evil way and their evil doings they procured this to themselves.
Original Hebrew ויעברו5674 בני1121 עמון5983 את853 הירדן3383 להלחם3898 גם1571 ביהודה3063 ובבנימין1144 ובבית1004 אפרים669 ותצר3334 לישׂראל3478 מאד׃3966