Exodus 11:4-10

4 And Moses said, These things saith the Lord, About midnight I go forth into the midst of Egypt.
5 And every first-born in the land of Egypt shall die, from the first-born of Pharao that sits on the throne, even to the first-born of the woman-servant that is by the mill, and to the first-born of all cattle.
6 And there shall be a great cry through all the land of Egypt, such as has not been, and such shall not be repeated any more.
7 But among all the children of Israel shall not a dog snarl with his tongue, either at man or beast; that thou mayest know how wide a distinction the Lord will make between the Egyptians and Israel.
8 And all these thy servants shall come down to me, and do me reverence, saying, Go forth, thou and all the people over whom thou presidest, and afterwards I will go forth.
9 And Moses went forth from Pharao with wrath. And the Lord said to Moses, Pharao will not hearken to you, that I may greatly multiply my signs and wonders in the land Egypt.
10 And Moses and Aaron wrought all these signs and wonders in the land Egypt before Pharao; and the Lord hardened the heart of Pharao, and he did not hearken to send forth the children of Israel out of the land of Egypt.

Exodus 11:4-10 Meaning and Commentary

INTRODUCTION TO EXODUS 11

Moses having an intimation from the Lord that one plague more would be brought on Pharaoh, and then he would let Israel go, when they should borrow of their neighbours jewels of gold and silver, the people being in great favour with the Egyptians, Ex 11:1-3, he declares to Pharaoh, before he went out of his presence, the slaying of all the firstborn in Egypt, which would issue in the dismission of Israel, and then he went out from him in great anger, Ex 11:4-8, but still Pharaoh would not hearken, and his heart was hardened, and he refused again to let Israel go, Ex 10:9,10.

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