Exodus 10
Exodus 10 brings locusts and then darkness — the ninth plague — and the end is now clearly in sight, though Pharaoh keeps grasping for a middle position that does not exist. The locusts consume everything the hail left, and Pharaoh's officials plead with him: do you not yet understand that Egypt is ruined? Pharaoh negotiates: the men can go, but not the women and children. Moses refuses. After the locusts come three days of thick darkness over Egypt — not mere cloud cover but the kind of darkness that can be felt, pressing against the Egyptian sun-god Ra's most fundamental claim. Yet Israel has light in their dwellings. Pharaoh tries once more: go, but leave your livestock. Moses refuses again: we do not know what we will need to worship the Lord until we get there. Pharaoh is furious and tells Moses to leave and never return, or he will die. Moses agrees he will not return. The confrontation is nearly over. God tells Moses at the start of this chapter that the hardening of Pharaoh's heart has a purpose beyond Egypt: so that you may tell your children and your grandchildren what I did. Memory and testimony are themselves acts of worship, and John 20:31 frames the entire Gospel in similar terms — written so that you may believe.