Exodus 8:1 uses the same divine command 'Let my people go, that they may serve me' — the identical formula for the plague of frogs.

Exodus 7:15 shows the same early morning meeting at the water when Moses confronted Pharaoh about the first plague — a recurring pattern.

Exodus 7:16 contains the same core demand 'Let my people go, that they may serve me' — the recurring refrain in Moses' warnings to Pharaoh.

Exodus 9:1 repeats the identical command 'Let my people go, that they may serve me' — the consistent summons before each plague.

Exodus 9:13 also commands Moses to rise early and stand before Pharaoh with the same 'Let my people go' — nearly identical wording.