Then the Lord said to Moses, “Go to Pharaoh and say to him, ‘This is what the Lord, the God of the Hebrews, says: “Let my people go, so that they may worship me.” 2 If you refuse to let them go and continue to hold them back, 3 the hand of the Lord will bring a terrible plague on your livestock in the field—on your horses, donkeys and camels and on your cattle, sheep and goats.4 But the Lord will make a distinction between the livestock of Israel and that of Egypt, so that no animal belonging to the Israelites will die.’”

5 The Lord set a time and said, “Tomorrow the Lord will do this in the land.” 6 And the next day the Lord did it: All the livestock of the Egyptians died, but not one animal belonging to the Israelites died. 7 Pharaoh investigated and found that not even one of the animals of the Israelites had died. Yet his heart was unyielding and he would not let the people go.

8 Then the Lord said to Moses and Aaron, “Take handfuls of soot from a furnace and have Moses toss it into the air in the presence of Pharaoh. 9 It will become fine dust over the whole land of Egypt, and festering boils will break out on people and animals throughout the land.”