Midrash sobre Job 34:20

Another explanation: "And it was in the middle of the night" - Elihu said (Job 34:20), "In one moment they die and at midnight:" When they died, everyone began to cry out, as it is stated (Exodus 12:30), "And Pharaoh got up at night, he and all of his servants and all of Egypt." Immediately (Ibid. 31), "And he called to Moshe and Aharon." Moshe said to him, "What does Pharaoh request? Who is coming to who, you to me or me to you?" He said [back] to him, "I request from you (Ibid.), 'Get up and go out from among my people.'" Why? "He is wise-hearted and courageous in strength; who has hardened his heart against Him and come out whole?" (Job 9:4)

Rabbi José said: All that night the Israelites were eating and drinking, rejoicing and taking wine and praising their God with a loud voice, whilst the Egyptians were crying with a bitter soul, because of the plague which came upon them suddenly, as it is said, "And there was a great cry in Egypt; for there was not a house where there was not one dead" (Ex. 12:80).