Unleavened bread - See Clarke on Exodus 12:15 (note), and Exodus 12:16 (note).

Seven days shalt thou eat unleavened bread,.... The Jews (y) gather from this place, and from Deuteronomy 16:8, that the obligation to eat unleavened bread lasted no longer than the first night of the seven days, but on the rest it was enough if they abstained from leavened bread, and it was lawful for them to eat of other food as they pleased; see Gill on Exodus 12:15, but the words are very express in both places, and so in the following verse, for eating unleavened bread, as well as abstaining from leavened; and, indeed, otherwise it would not be so clear and plain a commemoration of their case and circumstances, in which they were when they came out of Egypt; this bread of affliction, as it is called, Deuteronomy 16:3 being what would put them in mind thereof:

and in the seventh day shall be a feast to the Lord; an holy convocation, in which no work was to be done, except what was necessary for preparing food to eat, see Exodus 12:16.

(y) In Siphre apud Manasseh Ben lsrael. Conciliat. in loc.

Seven days thou shalt eat unleavened bread, and in the {d} seventh day shall be a feast to the LORD.

(d) Both the seventh and the first day were holy, as in Ex 12:16.

13:1-10 In remembrance of the destruction of the first-born of Egypt, both of man and of beast, and the deliverance of the Israelites out of bondage, the first-born males of the Israelites were set apart to the Lord. By this was set before them, that their lives were preserved through the ransom of the atonement, which in due time was to be made for sin. They were also to consider their lives, thus ransomed from death, as now to be consecrated to the service of God. The parents were not to look upon themselves as having any right in their first-born, till they solemnly presented them to God, and allowed his title to them. That which is, by special mercy, spared to us, should be applied to God's honour; at least, some grateful acknowledgment, in works of piety and charity, should be made. The remembrance of their coming out of Egypt must be kept up every year. The day of Christ's resurrection is to be remembered, for in it we were raised up with Christ out of death's house of bondage. The Scripture tells us not expressly what day of the year Christ rose, but it states particularly what day of the week it was; as the more valuable deliverance, it should be remembered weekly. The Israelites must keep the feast of unleavened bread. Under the gospel, we must not only remember Christ, but observe his holy supper. Do this in remembrance of him. Also care must be taken to teach children the knowledge of God. Here is an old law for catechising. It is of great use to acquaint children betimes with the histories of the Bible. And those who have God's law in their heart should have it in their mouth, and often speak of it, to affect themselves, and to teach others.