Exodus 11:10
Ver. 10. And Moses and Aaron did all these wonders before Pharaoh, &c,] Which are related in the preceding chapters:
and the Lord hardened Pharaoh's heart: one time after another, and yet more and more:
so that he would not let the children of Israel go out of his land; until the last plague, the slaying of the firstborn, was brought upon him and his people, related in the following chapter.
John Gill's Exposition of the Entire Bible.