Rashi on Exodus 11:8/רש"י על שמות י״א:ח׳

1וירדו כל עבדיך AND ALL THY SERVENTS SHALL COME DOWN [UNTO ME] — He showed respect to the king, for as a matter of fact ultimately Pharaoh himself came down to him at night, (Exodus 12:31) “And he said, Arise, go out from the midst of my people”; but Moses did not at the outset say to him, “And thou shalt come down to me and shalt prostrate thyself”, out of respect for the king, (Exodus Rabbah 7:3)

2אשר ברגליך (lit., who are at thy feet) — who go after (follow) thy counsel and ways.

3ואחרי כן אצא AND AFTER THAT I WILL GO OUT, with all my people, from thy land.

4ויצא מעם פרעה AND HE WENT OUT FROM PHARAOH — After he had concluded his words he went forth from his presence.

5בחרי אף IN FIERCENESS OF WRATH because he (Pharaoh) had said to him, (Exodus 10:28) “Do not again see my face.