Exodus 9:26

But against any of the children of Israel shall not a dog move his tongue, against man or beast: that ye may know how that the LORD doth put a difference between the Egyptians and Israel.

And the LORD shall sever between the cattle of Israel and the cattle of Egypt: and there shall nothing die of all that is the children’s of Israel.

They saw not one another, neither rose any from his place for three days: but all the children of Israel had light in their dwellings.

And the LORD did that thing on the morrow, and all the cattle of Egypt died: but of the cattle of the children of Israel died not one.

And the blood shall be to you for a token upon the houses where ye are: and when I see the blood, I will pass over you, and the plague shall not be upon you to destroy you, when I smite the land of Egypt.