וְנֶאְמַ֨ן בֵּיתְךָ֧ וּמַֽמְלַכְתְּךָ֛ עַד־עוֹלָ֖ם לְפָנֶ֑יךָ כִּֽסְאֲךָ֔ יִהְיֶ֥ה נָכ֖וֹן עַד־עוֹלָֽם׃
And thy house and thy kingdom shall be made sure for ever before thee; thy throne shall be established for ever.’
Read kabbalistic (mystical) interpretation of II Samuel 7:16: and classical mystical sources.