8 Now the LORD spoke to Moses and Aaron, saying, 9 “When Pharaoh speaks to you, saying, `Work a miracle,’ then you shall say to Aaron, `Take your staff and throw it down before Pharaoh, that it may become a serpent.'”10 So Moses and Aaron came to Pharaoh, and thus they did just as the LORD had commanded; and Aaron threw his staff down before Pharaoh and his servants, and it became a serpent. 11 Then Pharaoh also called for the wise men and the sorcerers, and they also, the magicians of Egypt, did the same with their secret arts. 12 For each one threw down his staff and they turned into serpents. But Aaron’s staff swallowed up their staffs. 13 Yet Pharaoh’s heart was hardened, and he did not listen to them, as the LORD had said.
Satan is pretty good at deception, but God will always make sure you know who is the right voice to believe. There’s no doubt Pharaoh knew Moses and Aaron were legit, but there was no way he was going to let the Israelites go just because God could turn a stick into a snake. It would take more than that to convince him it was worth it. When God speaks, listen. You don’t want God’s voice to get as loud as it would in Pharaoh’s case.