According to Exodus, what was the second plague of Egypt?

The Plagues of Egypt, also called the ten biblical plagues, were ten calamities that, according to the biblical Book of Exodus, Yahweh inflicted upon Egypt to persuade the Pharaoh to release the ill-treated Israelites from slavery. The Pharaoh capitulated after the tenth plague, triggering the Exodus of the Hebrew people.

The plagues served to contrast the power of the God of Israel with the Egyptian gods, invalidating them. Some commentators have associated several of the plagues with judgment on specific gods associated with the Nile, fertility and natural phenomena.According to Exodus 12:12, all the gods of Egypt would be judged through the tenth and final plague: "On that same night I will pass through Egypt and strike down every firstborn of both people and animals, and I will bring judgment on all the gods of Egypt. I am the LORD."

The plagues in order of occurrence were:

1)Water into blood

2)Frogs

3)Lice

4)Flies

5)Diseased livestock

6)Boils

7)Hail

8)Locusts

9)3 Days of darkness

10)Death of firstborn

The frog plague can be found in Exodus 8:1-4.