The Bible
Exodus 13
The firstborn of man and of beasts are to be sanctified unto the Lord—The Feast of Unleavened Bread is to be kept in the land of Canaan—Moses takes Joseph’s bones out of Egypt—The Lord attends Israel in a pillar of cloud by day and a pillar of fire by night.
1And the Lord spake unto Moses, saying,
4This day came ye out in the month Abib.
6Seven days thou shalt eat unleavened bread, and in the seventh day shall be a feast to the Lord.
10Thou shalt therefore keep this ordinance in his season from year to year.
20¶ And they took their journey from Succoth, and encamped in Etham, in the edge of the wilderness.