וְעָבְד֤וּ אֹתוֹ֙ כָּל־הַגּוֹיִ֔ם וְאֶת־בְּנ֖וֹ וְאֶֽת־בֶּן־בְּנ֑וֹ עַ֣ד בֹּא־עֵ֤ת אַרְצוֹ֙ גַּם־ה֔וּא וְעָ֤בְדוּ בוֹ֙ גּוֹיִ֣ם רַבִּ֔ים וּמְלָכִ֖ים גְּדֹלִֽים׃
And all the nations shall serve him, and his son, and his son’s son, until the time of his own land come; and then many nations and great kings shall make him their bondman.
Rashi on Jeremiah
until the time of his own land come When Darius the Mede and Cyrus come and slay Belshazzar.