See Judges 2:2 note.

And they took their daughters - They formed matrimonial alliances with those proscribed nations, served their idols, and thus became one with them in politics and religion.

And they took their daughters to be their wives, and gave their daughters to their sons,.... The Israelites intermarried with the inhabitants of the land, contrary to the express command of God, Deuteronomy 7:3; whereby they confounded their families, debased their blood, and were ensnared into idolatry, as follows: perhaps to these unlawful marriages, in their first settlement in the land of Canaan, reference is had in Ezekiel 16:3, "thy father was an Amorite and thy mother an Hittite"; an Amorite marrying a daughter of Israel, and an Israelitish man an Hittite woman:

and served their gods; this was the natural consequence of their intermarriages, which the Lord foresaw, and therefore cautioned them against them, Exodus 34:15.

And they took {c} their daughters to be their wives, and gave their daughters to their sons, and served their gods.

(c) Contrary to God's commandment, De 7:3.

3:6 Served their gods - Were drawn to idolatry by the persuasions and examples of their yoke - fellows.

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.