Ten plagues were sent, culminating in the death of the firstborn. (…

Now there arose up a new king over Egypt, which knew not Joseph. (Exodus 1:8)

Exodus 1:8 (KJV)

And Pharaoh charged all his people, saying, Every son that is born ye shall cast into the river, and every daughter ye shall save alive. (Exodus 1:22)

Exodus 1:22 (KJV)

Let my people go, that they may hold a feast unto me in the wilderness. (Exodus 5:1)

Exodus 5:1 (KJV)

Ye are idle, ye are idle... Let there more work be laid upon the men, that they may labour therein... And the tale of the bricks... shall be diminished. (Exodus 5:17-19)

Exodus 5:17 (KJV)

Then the magicians said unto Pharaoh, This is the finger of God: and Pharaoh's heart was hardened. (Exodus 8:18-19)

Exodus 8:18 (KJV)

And it came to pass, that at midnight the LORD smote all the firstborn in the land of Egypt... but against any of the children of Israel... not a dog shall move his tongue. (Exodus 12:29)

Exodus 12:29 (KJV)