(4) To prove Israel.--See Judges 2:22.

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.And they were to prove Israel by them,.... They were left in the land, as to inure them to war, and try their courage, so to prove their faithfulness to God:

to know whether they would hearken to the commandments, of the Lord,

which he commanded their fathers by the hand of Moses; even all the commandments of the Lord delivered to them by Moses, moral, civil, and ceremonial, and particularly those that concerned the destruction of the Canaanites, their altars, and their idols, Deuteronomy 7:1.