Exodus 12:40-42

Revised Standard Version

⁴⁰ The time that the people of Israel dwelt in Egypt was four hundred and thirty years. ⁴¹ And at the end of four hundred and thirty years, on that very day, all the hosts of the Lord went out from the land of Egypt. ⁴² It was a night of watching by the Lord, to bring them out of the land of Egypt; so this same night is a night of watching kept to the Lord by all the people of Israel throughout their generations.