Exodus 12:33-51 NIV
The Egyptians urged the people to hurry and leave the country. “For otherwise,” they said, “we will all die!” So the people took their dough before the yeast was added, and carried it on their shoulders in kneading troughs wrapped in clothing. The Israelites did as Moses instructed and asked the Egyptians for articles of silver and gold and for clothing. The LORD had made the Egyptians favorably disposed toward the people, and they gave them what they asked for; so they plundered the Egyptians.
The Israelites journeyed from Rameses to Sukkoth. There were about six hundred thousand men on foot, besides women and children. Many other people went up with them, and also large droves of livestock, both flocks and herds. With the dough the Israelites had brought from Egypt, they baked loaves of unleavened bread. The dough was without yeast because they had been driven out of Egypt and did not have time to prepare food for themselves.
Now the length of time the Israelite people lived in Egypt was 430 years. At the end of the 430 years, to the very day, all the LORD’s divisions left Egypt. Because the LORD kept vigil that night to bring them out of Egypt, on this night all the Israelites are to keep vigil to honor the LORD for the generations to come.
The LORD said to Moses and Aaron, “These are the regulations for the Passover meal:
“No foreigner may eat it. Any slave you have bought may eat it after you have circumcised him, but a temporary resident or a hired worker may not eat it.
“It must be eaten inside the house; take none of the meat outside the house. Do not break any of the bones. The whole community of Israel must celebrate it.
“A foreigner residing among you who wants to celebrate the LORD’s Passover must have all the males in his household circumcised; then he may take part like one born in the land. No uncircumcised male may eat it. The same law applies both to the native-born and to the foreigner residing among you.”
All the Israelites did just what the LORD had commanded Moses and Aaron. And on that very day the LORD brought the Israelites out of Egypt by their divisions.
NIV: New International Version