Exodus 9:5

behold, the hand of Yahweh is on your livestock which are in the field, on the horses, on the donkeys, on the camels, on the herds, and on the flocks with a very grievous pestilence.

Yahweh will make a distinction between the livestock of Israel and the livestock of Egypt; and nothing shall die of all that belongs to the children of Israel.

Yahweh did that thing on the next day; and all the livestock of Egypt died, but of the livestock of the children of Israel, not one died.

Pharaoh sent, and, behold, there was not so much as one of the livestock of the Israelites dead. But the heart of Pharaoh was stubborn, and he didn't let the people go.