Exodus 5:6

5:6 That same day Pharaoh commanded the slave masters and foremen who were over the people:

Exodus 10:22

10:22 So Moses extended his hand toward heaven, and there was absolute darkness throughout the land of Egypt for three days.

Exodus 12:8

12:8 They will eat the meat the same night; they will eat it roasted over the fire with bread made without yeast and with bitter herbs.