וְהִפְרֵתִ֤י אֹֽתְךָ֙ בִּמְאֹ֣ד מְאֹ֔ד וּנְתַתִּ֖יךָ לְגוֹיִ֑ם וּמְלָכִ֖ים מִמְּךָ֥ יֵצֵֽאוּ׃
And I will make thee exceeding fruitful, and I will make nations of thee, and kings shall come out of thee.
Read kabbalistic (mystical) interpretation of Genesis 17:6: and classical mystical sources.