Charles Ellicott Commentary Judges 3:6

"and they took their daughters to be their wives, and gave their own daughters to their sons and served their gods." — Judges 3:6 (ASV)

And they took their daughters. —This beginning of intermarriages shows that we are now a generation removed from the days of Joshua. Such marriages had been forbidden in Deuteronomy 7:3, but are not among the sins denounced by the Angel-messenger at Bochim (Judges 2:1).