Ezek 37:22

וְעָשִׂ֣יתִי אֹ֠תָם לְג֨וֹי אֶחָ֤ד בָּאָ֨רֶץ֙ בְּהָרֵ֣י יִשְׂרָאֵ֔ל וּמֶ֧לֶךְ אֶחָ֛ד יִֽהְיֶ֥ה לְכֻלָּ֖ם לְמֶ֑לֶךְ וְלֹ֤א יהיה יִֽהְיוּ־עוֹד֙ לִשְׁנֵ֣י גוֹיִ֔ם וְלֹ֨א יֵחָ֥צוּ ע֛וֹד לִשְׁתֵּ֥י מַמְלָכ֖וֹת עֽוֹד׃

I will make them one nation in the land, on the mountains of Israel, and one king will rule over all of them. Then they will no longer be two nations and will never again be divided into two kingdoms.