Exodus 7:4

4 And Pharao will not hearken to you, and I will lay my hand upon Egypt; and will bring out my people the children of Israel with my power out of the land of Egypt with great vengeance.

Exodus 7:4 In-Context

2 And thou shalt say to him all things that I charge thee, and Aaron thy brother shall speak to Pharao, that he should send forth the children of Israel out of his land.
3 And I will harden the heart of Pharao, and I will multiply my signs and wonders in the land of Egypt.
4 And Pharao will not hearken to you, and I will lay my hand upon Egypt; and will bring out my people the children of Israel with my power out of the land of Egypt with great vengeance.
5 And all the Egyptians shall know that I am the Lord, stretching out my hand upon Egypt, and I will bring out the children of Israel out of the midst of them.
6 And Moses and Aaron did as the Lord commanded them, so did they.

The Brenton translation of the Septuagint is in the public domain.