Exodus 3:18-20

Darby Translation

¹⁸ And they shall hearken to thy voice. And thou shalt come, thou and the elders of Israel, unto the king of Egypt, and ye shall say unto him, Jehovah, the God of the Hebrews, hath met with us; and now, let us go, we pray thee, three days' journey into the wilderness, that we may sacrifice to Jehovah our God.

¹⁹ But I know that the king of Egypt will not let you go, no, not by a powerful hand.

²⁰ And I will stretch out my hand and smite Egypt with all my wonders which I will do in the midst thereof; and after that he will let you go.