27 But Yahweh hardened Pharaoh’s heart, and he wouldn’t let them go.
Exodus 10:27 Cross References - WEB
Exodus 4:21
21 Yahweh said to Moses, “When you go back into Egypt, see that you do before Pharaoh all the wonders which I have put in your hand, but I will harden his heart and he will not let the people go.
Exodus 10:1
1 Yahweh said to Moses, “Go in to Pharaoh, for I have hardened his heart and the heart of his servants, that I may show these my signs among them;
Exodus 10:20
20 But Yahweh hardened Pharaoh’s heart, and he didn’t let the children of Israel go.
Exodus 14:4
4 I will harden Pharaoh’s heart, and he will follow after them; and I will get honor over Pharaoh, and over all his armies; and the Egyptians shall know that I am Yahweh.” They did so.
Exodus 14:8
8 Yahweh hardened the heart of Pharaoh king of Egypt, and he pursued the children of Israel; for the children of Israel went out with a high hand.
Revelation 9:20
20 The rest of mankind, who were not killed with these plagues, didn’t repent of the works of their hands, that they wouldn’t worship demons, and the idols of gold, and of silver, and of brass, and of stone, and of wood; which can’t see, hear, or walk.