Exodus 9:11-13

New Revised Standard Version, Anglicised Catholic Edition

¹¹ The magicians could not stand before Moses because of the boils, for the boils afflicted the magicians as well as all the Egyptians. ¹² But the Lord hardened the heart of Pharaoh, and he would not listen to them, just as the Lord had spoken to Moses.

The Seventh Plague: Thunder and Hail

¹³ Then the Lord said to Moses, ‘Rise up early in the morning and present yourself before Pharaoh, and say to him, “Thus says the Lord, the God of the Hebrews: Let my people go, so that they may worship me.