Exodus 12:40-51

Now the sojourn of the children of Israel who lived in Egypt was four hundred and thirty years. And it came to pass at the end of the four hundred and thirty years—on that very same day—it came to pass that all the armies of the LORD went out from the land of Egypt. It is a night of solemn observance to the LORD for bringing them out of the land of Egypt. This is that night of the LORD, a solemn observance for all the children of Israel throughout their generations. And the LORD said to Moses and Aaron, “This is the ordinance of the Passover: No foreigner shall eat it. But every man’s servant who is bought for money, when you have circumcised him, then he may eat it. A sojourner and a hired servant shall not eat it. In one house it shall be eaten; you shall not carry any of the flesh outside the house, nor shall you break one of its bones. All the congregation of Israel shall keep it. And when a stranger dwells with you and wants to keep the Passover to the LORD, let all his males be circumcised, and then let him come near and keep it; and he shall be as a native of the land. For no uncircumcised person shall eat it. One law shall be for the native-born and for the stranger who dwells among you.” Thus all the children of Israel did; as the LORD commanded Moses and Aaron, so they did. And it came to pass, on that very same day, that the LORD brought the children of Israel out of the land of Egypt according to their armies.