he feared greatly, because Gibeon was a great city, like one of the royal cities, and because it was greater than Ai, and all its men were warriors.
Joshua and the hosts of Israel had now been a good while in the land of Canaan, and no great matters were effected; they were made masters of Jericho by a miracle, of Ai by stratagem, and of Gibeon by surrender, and that was all; hitherto the progress of their victories had not seemed proportionable to the magnificence of their entry and the glory of their beginnings.
Commenting on Joshua 10:1-6
That they feared greatly,.... The king of Jerusalem and his people, lest they should fall into the hands of the Israelites, and be used as Jericho and Ai, and the kings and inhabitants of them were, and that they would be the next that should fall a sacrifice to them; for Gibeon was fifty furlongs from Jerusalem, as Josephus says (a); and in another place...
they feared greatly--The dread inspired by the rapid conquests of the Israelites had been immensely increased by the fact of a state so populous and so strong as Gibeon having found it expedient to submit to the power and the terms of the invaders.