Exodus 8:13-15

American Standard Version

¹³ And Jehovah did according to the word of Moses; and the frogs died out of the houses, out of the courts, and out of the fields. ¹⁴ And they gathered them together in heaps; and the land stank. ¹⁵ But when Pharaoh saw that there was respite, he ^[a]hardened his heart, and hearkened not unto them; as Jehovah had spoken.