Exodus 12:29-30
The Deliverance from Egypt
12:29 It happened at midnight – the Lord attacked all the firstborn in the land of Egypt, from the firstborn of Pharaoh who sat on his throne to the firstborn of the captive who was in the prison, and all the firstborn of the cattle.
12:30 Pharaoh got up in the night, along with all his servants and all Egypt, and there was a great cry in Egypt, for there was no house in which there was not someone dead.
Exodus 12:1
The Institution of the Passover
12:1 The Lord said to Moses and Aaron in the land of Egypt,
Exodus 5:1-3
Opposition to the Plan of God
5:1 Afterward Moses and Aaron went to Pharaoh and said, “Thus says the Lord, the God of Israel, ‘Release my people so that they may hold a pilgrim feast to me in the desert.’”
5:2 But Pharaoh said, “Who is the Lord that I should obey him by releasing Israel? I do not know the Lord, and I will not release Israel!”
5:3 And they said, “The God of the Hebrews has met with us. Let us go a three-day journey into the desert so that we may sacrifice to the Lord our God, so that he does not strike us with plague or the sword.”