Exodus 9:7-18
English Standard Version
8And the Lord said to Moses and Aaron, "Take handfuls of soot from the kiln, and let Moses throw them in the air in the sight of Pharaoh.
9It shall become fine dust over all the land of Egypt, and become boils breaking out in sores on man and beast throughout all the land of Egypt."
10So they took soot from the kiln and stood before Pharaoh. And Moses threw it in the air, and it became boils breaking out in sores on man and beast.
11And the magicians could not stand before Moses because of the boils, for the boils came upon the magicians and upon all the Egyptians.
12But the Lord hardened the heart of Pharaoh, and he did not listen to them, as the Lord had spoken to Moses.
13Then the Lord said to Moses, "Rise up early in the morning and present yourself before Pharaoh and say to him, ‘Thus says the Lord, the God of the Hebrews, "Let my people go, that they may serve me.
14For this time I will send all my plagues on you yourself, and on your servants and your people, so that you may know that there is none like me in all the earth.
15For by now I could have put out my hand and struck you and your people with pestilence, and you would have been cut off from the earth.
16But for this purpose I have raised you up, to show you my power, so that my name may be proclaimed in all the earth.
17You are still exalting yourself against my people and will not let them go.
18Behold, about this time tomorrow I will cause very heavy hail to fall, such as never has been in Egypt from the day it was founded until now.
