Exodus 9:32

29 Moses said to him, "As soon as I have gone out of the city, I will spread abroad my hands to Yahweh. The thunders shall cease, neither shall there be any more hail; that you may know that the earth is Yahweh`s.

30 But as for you and your servants, I know that you will not yet fear Yahweh God."

31 The flax and the barley were struck, for the barley was in the ear, and the flax was in bloom.

32 But the wheat and the spelt were not struck, for they had not grown up.

33 Moses went out of the city from Pharaoh, and spread abroad his hands to Yahweh; and the thunders and hail ceased, and the rain was not poured on the earth.

34 When Pharaoh saw that the rain and the hail and the thunders were ceased, he sinned yet more, and hardened his heart, he and his servants.

35 The heart of Pharaoh was hardened, and he didn`t let the children of Israel go, as Yahweh had spoken through Moses.