Exodus 9:11-13

Revised Standard Version

¹¹ And the magicians could not stand before Moses because of the boils, for the boils were upon the magicians and upon all the Egyptians. ¹² But the Lord hardened the heart of Pharaoh, and he did not listen to them; 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 stand before Pharaoh, and say to him, ‘Thus says the Lord, the God of the Hebrews, “Let my people go, that they may serve me.