That they gathered themselves together, to fight with Joshua and with Israel, with one accord.

Wesley's Notes

9:2 Together - They entered into a league to do this. Tho' they were many kings of different nations, and doubtless of different interests, often at variance with each other, yet they are all determined to unite against Israel. O that Israel would learn this of Canaanites, to sacrifice private interests to the public good, and to lay aside all animosities among themselves, that they may cordially unite against the common enemy.

King James Translators' Notes

accord: Heb. mouth

Jamieson-Fausset-Brown Bible Commentary

2. they gathered themselves together, to fight with Joshua and with Israel, with one accord-Although divided by separate interests and often at war with each other, a sense of common danger prompted them to suspend their mutual animosities, that by their united forces they might prevent the land from falling into the hands of foreign masters.

Matthew Henry's Concise Commentary

9:1,2 Hitherto the Canaanites had defended themselves, but here they consult to attack Israel. Their minds were blinded, and their hearts hardened to their destruction. Though often at enmity with each other, yet they united against Israel. Oh that Israel would learn of Canaanites, to sacrifice private interests to the public welfare, and to lay aside all quarrels among themselves, that they may unite against the enemies of God's kingdom!