Exodus 9:5-7 New American Standard Bible (NASB)

5. The Lord set a definite time, saying, "Tomorrow the Lord will do this thing in the land."

6. So the Lord did this thing on the next day, and all the livestock of Egypt died; but of the livestock of the sons of Israel, not one died.

7. Pharaoh sent, and behold, there was not even one of the livestock of Israel dead. But the heart of Pharaoh was hardened, and he did not let the people go.

Exodus 9