וַיִּקְח֨וּ אֶת־בְּנוֹתֵיהֶ֤ם לָהֶם֙ לְנָשִׁ֔ים וְאֶת־בְּנוֹתֵיהֶ֖ם נָתְנ֣וּ לִבְנֵיהֶ֑ם וַיַּעַבְד֖וּ אֶת־אֱלֹהֵיהֶֽם׃ (פ)
and they took their daughters to be their wives, and gave their own daughters to their sons, and served their gods.
Read kabbalistic (mystical) interpretation of Judges 3:6: and classical mystical sources.