In the third aliyah, after the terrifying days of darkness, Pharaoh calls Moshe again, but G-d hardens Pharaoh's heart again and so he sends Moshe away another time, this time saying to Moshe that Moshe won't see the face of Pharaoh anymore (which will turn out to be true).

Then G-d speaks to Moshe (right there) saying that there is one final plague to go, after which the Jews will be thrust out of Egypt. As preparation, all Jewish men should ask their men neighbors and all Jewish women should ask their women neighbors for jewels of silver and gold; and G-d made all the Egyptians agreeable.