וְהִֽתְחַתְּנ֖וּ אֹתָ֑נוּ בְּנֹֽתֵיכֶם֙ תִּתְּנוּ־לָ֔נוּ וְאֶת־בְּנֹתֵ֖ינוּ תִּקְח֥וּ לָכֶֽם׃
And make ye marriages with us; give your daughters unto us, and take our daughters unto you.
Read kabbalistic (mystical) interpretation of Genesis 34:9: and classical mystical sources.