Since their dough had no leaven, the people baked what they had brought out of Egypt into unleavened loaves. For when they had been driven out of Egypt, they could not delay and had not prepared any provisions for themselves. Now the duration of the Israelites' stay in Egypt was 430 years. At the end of the 430 years, to the very day, all the Lord's divisions went out of the land of Egypt. Because the Lord kept a vigil that night to bring them out of the land of Egypt, this same night is to be a vigil to the Lord, to be observed by all the Israelites for the generations to come.