12:50. And all the children of Israel did as the Lord had commanded Moses and Aaron.
12:51. And the same day the Lord brought forth the children of Israel out of the land of Egypt by their companies.
Exodus Chapter 13
The paschal solemnity is to be observed; and the firstborn are to be consecrated to God. The people are conducted through the desert by a pillar of fire in the night, and a cloud in the day.
13:1. And the Lord spoke to Moses, saying:
13:2. Sanctify unto me every firstborn that openeth the womb among the children of Israel, as well of men as of beasts: for they are all mine.
Sanctify unto me every firstborn... Sanctification in this place means that the firstborn males of the Hebrews should be deputed to the ministry in the divine worship; and the firstborn of beasts to be given for a sacrifice.
13:3. And Moses said to the people: Remember this day in which you came forth out of Egypt, and out of the house of bondage, for with a strong hand hath the Lord brought you forth out of this place: that you eat no leavened bread.
13:4. This day you go forth in the month of new corn.
13:5. And when the Lord shall have brought thee into the land of the Chanaanite, and the Hethite, and the Amorrhite, and the Hevite, and the Jebusite, which he swore to thy fathers that he would give thee, a land that floweth with milk and honey, thou shalt celebrate this manner of sacred rites in this month.