Charles Ellicott Commentary Exodus 7:3

"And I will harden Pharaoh`s heart, and multiply my signs and my wonders in the land of Egypt." — Exodus 7:3 (ASV)

I will harden Pharaoh’s heart. —See the comment on Exodus 4:21.

My signs and my wonders. —“Signs” (‘othoth) were miracles done as credentials, to prove a mission (Exodus 4:8–9; Exodus 4:30). “Wonders” (môphôth) were miracles generally; niphle’oth, also translated “wonders” (Exodus 3:20), were miracles performed as punishment. These last are also called shôphëtiin, “judgments.” (See Exodus 7:4.)