Exo 7:9-10 | ESV | STEP | When Pharaoh says to you, Prove yourselves by working a miracle , then you shall say to Aaron , Take your staff and cast it down before Pharaoh , that it may become a serpent .

Exodus 7:9-10

9 “When Pharaoh says to you, ^a‘Prove yourselves by working a miracle,’ then you shall say to Aaron, ‘Take your staff and cast it down before Pharaoh, that it may become a serpent.’” 10 So Moses and Aaron went to Pharaoh and did just as the Lord commanded. Aaron cast down his staff before Pharaoh and his servants, and it became a serpent.