וְעָ֣בְד֔וּ אֵ֖ת יְהוָ֣ה אֱלֹֽהֵיהֶ֑ם וְאֵת֙ דָּוִ֣ד מַלְכָּ֔ם אֲשֶׁ֥ר אָקִ֖ים לָהֶֽם׃ (ס)
But they shall serve the LORD their God, And David their king, Whom I will raise up unto them.
Read kabbalistic (mystical) interpretation of Jeremiah 30:9: and classical mystical sources.