Exodus 8:21

8:21 If you do not release my people, then I am going to send swarms of flies on you and on your servants and on your people and in your houses. The houses of the Egyptians will be full of flies, and even the ground they stand on.

Exodus 16:3

16:3 The Israelites said to them, “If only we had died by the hand of the Lord in the land of Egypt, when we sat by the pots of meat, when we ate bread to the full, for you have brought us out into this desert to kill this whole assembly with hunger!”