31 Now these are the nations that the Lord left, to test Israel by them, that is, all in Israel who had not experienced all the wars in Canaan. 2 It was only in order that the generations of the people of Israel might know war, to teach war to those who had not known it before. 3 These are the nations: the five lords of the Philistines and all the Canaanites and the Sidonians and the Hivites who lived on Mount Lebanon, from Mount Baal-hermon as far as Lebo-hamath. 4 They were for the testing of Israel, to know whether Israel would obey the commandments of the Lord, which he commanded their fathers by the hand of Moses. 5 So the people of Israel lived among the Canaanites, the Hittites, the Amorites, the Perizzites, the Hivites, and the Jebusites. 6 And their daughters they took to themselves for wives, and their own daughters they gave to their sons, and they served their gods.
7 And the people of Israel did what was evil in the sight of the Lord. They forgot the Lord their God and served the Baals and the Asheroth.
Matthew Henry's Commentary on Judges 3:1-7
Commentary on Judges 3:1-7
(Read Judges 3:1-7)
As the Israelites were a type of the church on earth, they were not to be idle and slothful. The Lord was pleased to try them by the remains of the devoted nations they spared. Temptations and trials detect the wickedness of the hearts of sinners; and strengthen he graces of believers in their daily conflict with Satan, sin, and this evil world. They must live in this world, but they are not of it, and are forbidden to conform to it. This marks the difference between the followers of Christ and mere professors. The friendship of the world is more fatal than its enmity; the latter can only kill the body, but the former murders many precious souls.