And when Pharaoh saw that the rain, the hail, and the thunder had ceased, he sinned yet more; and he hardened his heart, he and his servants.
Exodus 9:34
Surrounding context
9:33 So Moses went out of the city from Pharaoh and spread out his hands to the LORD; then the thunder and the hail ceased, and the rain was not poured on the earth.
9:34 And when Pharaoh saw that the rain, the hail, and the thunder had ceased, he sinned yet more; and he hardened his heart, he and his servants.
9:35 So the heart of Pharaoh was hard; neither would he let the children of Israel go, as the LORD had spoken by Moses.