The Plagues of YHWH

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

Passover is a major Jewish holiday that celebrates the Biblical story of the Israelites' escape from slavery in Egypt.

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

The Plagues of Egypt, in the account of the book of Exodus, are ten disasters inflicted on Biblical Egypt by YHWH in order to convince the Pharaoh to emancipate the enslaved Israelites.

From the Jewish Torah, Exodus 7:
https://biblehub.com/niv/exodus/7.htm

The Plague of Blood

YHWH said to Moses, “Tell Aaron, ‘Take your staff and stretch out your hand over the waters of Egypt — over the streams and canals, over the ponds and all the reservoirs — and they will turn to blood.’ Blood will be everywhere in Egypt, even in vessels of wood and stone.”