“And Pharaoh turned and went into his house, neither did he set his heart to this also.”
King James Version (KJV)
7:22 And the magicians did so - By God's permission with their enchantments; and this served Pharaoh for an excuse not to set his heart to this also, (#Ex 7:23|,) and a poor excuse it was. Could they have turned the river of blood into water again, it had been something; then they had proved their power, and Pharaoh had been obliged to them as his benefactors.
7:25 Seven days were fulfilled - Before this plague was removed.