"In the Book of Exodus, the Israelites are enslaved in ancient Egypt…To show his power, [God] inflicts a series of 10 plagues on the Egyptians"

Plagues of Egypt

https://en.wikipedia.org/wiki/Plagues_of_Egypt

POTUS keeps saying "plague" at the daily corona virus press conferences.

Passover is conflated with the tenth plague of Egypt

https://en.wikipedia.org/wiki/Passover

"The origins of the Passover festival predate the Exodus. The Passover ritual, prior to Deuteronomy, is widely thought to have its origins in an apotropaic rite, unrelated to the Exodus, to ensure the protection of a family home, a rite conducted wholly within a clan. Hyssop was employed to daub the blood of a slaughtered sheep on the lintels and door posts to ensure that demonic forces could not enter the home.

A further hypothesis maintains that, once the Priestly Code was promulgated, the Exodus narrative took on a central function, as the apotropaic rite was, arguably, amalgamated with the Canaanite agricultural festival of spring which was a ceremony of unleavened bread, connected with the barley harvest. As the Exodus motif grew, the original function and symbolism of these double origins was lost. Several motifs replicate the features associated with the Mesopotamian Akitu festival. Other scholars, John Van Seters, J.B.Segal and Tamara Prosic disagree with the merged two-festivals hypothesis."

"In the Book of Exodus, the Israelites are enslaved in ancient Egypt. Yahweh, the god of the Israelites, appears to Moses in a burning bush and commands Moses to confront Pharaoh. To show his power, Yahweh inflicts a series of 10 plagues on the Egyptians, culminating in the 10th plague, the death of the first-born.

This is what the LORD says: "About midnight I will go throughout Egypt. Every firstborn son in Egypt will die, from the firstborn son of Pharaoh, who sits on the throne, to the firstborn of the slave girl, who is at her hand mill, and all the firstborn of the cattle as well. There will be loud wailing throughout Egypt—worse than there has ever been or ever will be again."

— Exodus 11:4–6

Before this final plague Yahweh commands Moses to tell the Israelites to mark a lamb's blood above their doors in order that Yahweh will pass over them (i.e., that they will not be touched by the death of the firstborn). "