Exodus 8:5
And the Lord spake unto Moses, Say unto Aaron, Stretch forth thine hand with thy rod over the streams, over the rivers, and over the ponds, and cause frogs to come up upon the land of Egypt.
Cross-reference
Exodus 8:16
Parallel
Exodus 8:16 again commands stretching out the staff to bring gnats — the same pattern of plague through Aaron's action.
Exodus 7:19
Parallel
Exodus 7:19 describes the identical command to stretch out the hand over waters for the plague of blood — parallel plague initiation.
Exodus 9:22
Parallel
Exodus 9:22 again commands stretching out the hand to bring hail — the same pattern of divine judgment through Moses' gesture.
Exodus 14:26
Parallel
Exodus 14:26 commands stretching out the hand over the sea to bring judgment on Egypt — the same gesture for a different miracle.
Joshua 8:18
Parallel
In Joshua 8:18, Joshua is told to stretch out his javelin over Ai — a similar gesture of divine empowerment in battle.