וְאַתָּ֣ה יְ֭הוָה לְעוֹלָ֣ם תֵּשֵׁ֑ב וְ֝זִכְרְךָ֗ לְדֹ֣ר וָדֹֽר׃
Du aber, Herr, thronst ewiglich, und dein Angedenken ist für alle Geschlechter.
Rashi on Psalms
But You Who will be enthroned forever, and Who swore to us by Yourself, just as You exist, it is incumbent upon You to fulfill it. Therefore...