The Lord told Moses to say to Pharaoh that he must let his people go, or a very severe plague would strike Egypt's livestock, horses, donkeys, camels, cattle and sheep. The Lord would distinguish between the livestock of Israel and of Egypt, and nothing belonging to the Israelites would die. The next day all the livestock of Egypt died, but none of Israel's. Even so, Pharaoh's heart was hardened.
God then told Moses and Aaron to take handfuls of soot from a kiln, and Moses was to throw it toward heaven in front of Pharaoh. It became fine dust over all Egypt and caused festering boils on people and animals. But the Lord hardened Pharaoh's heart and he did not listen.
Again Moses stood before Pharaoh and announced that this time the Lord would send all his plagues on Pharaoh's heart, his servants and his people, so that he would know there is none like the Lord in all the earth. God had raised him up to show him his power. Tomorrow at this time a very heavy hail would fall, and whoever brought his servants and livestock into shelter would be spared. Some of Pharaoh's servants feared the word of the Lord and hurried to shelter; others paid no attention.
Moses stretched out his staff toward heaven, and the Lord sent thunder, hail and fire on the land. It was the worst hail in the whole history of Egypt, and it struck everything in the field, people, animals and plants. Only in the land of Goshen was there no hail. Pharaoh summoned Moses and Aaron and said that this time he had sinned, that the Lord was in the right and that he and his people were wrong. Moses promised to pray, though he knew that Pharaoh and his servants did not yet fear the Lord. The flax and barley were ruined, but the wheat and emmer were not, since they ripen later. When the rain, thunder and hail stopped, Pharaoh sinned again and hardened his heart.