Exodus 9:4-6

Amplified Bible

⁴ But the Lord will make a distinction between the livestock of Israel and the livestock of Egypt, so that nothing that belongs to the Israelites will die.”’” ⁵ The Lord set a [definite] time, saying, “Tomorrow the Lord will do this thing in the land.” ⁶ And the Lord did this thing the next day, and all [kinds of] the livestock of Egypt died; but of the livestock of the Israelites, not one died.