In the first month, in the fourteenth day of the month, ye shall have the passover, a feast of seven days; unleavened bread shall be eaten.

Scofield Reference Notes

Margin first month

i.e. April. Ex 12:18 Num 9:2,3 28:16,17 Dt 16:1.

Jamieson-Fausset-Brown Bible Commentary

21. As a new solemnity, the feast of consecration is to prepare for the passover; so the passover itself is to have different sacrifices from those of the Mosaic law. Instead of one ram and seven lambs for the daily burnt offering, there are to be seven bullocks and seven rams. So also whereas the feast of tabernacles had its own offerings, which diminished as the days of the feast advanced, here the same are appointed as on the passover. Thus it is implied that the letter of the law is to give place to its spirit, those outward rites of Judaism having no intrinsic efficacy, but symbolizing the spiritual truths of Messiah's kingdom, as for instance the perfect holiness which is to characterize it. Compare 1Co 5:7, 8, as to our spiritual "passover," wherein, at the Lord's supper, we feed on Christ by faith, accompanied with "the unleavened bread of sincerity and truth." Literal ordinances, though not slavishly bound to the letter of the law, will set forth the catholic and eternal verities of Messiah's kingdom.

Matthew Henry's Concise Commentary

45:1-25 In the period here foretold, the worship and the ministers of God will be provided for; the princes will rule with justice, as holding their power under Christ; the people will live in peace, ease, and godliness. These things seem to be represented in language taken from the customs of the times in which the prophet wrote. Christ is our Passover that is sacrificed for us: we celebrate the memorial of that sacrifice, and feast upon it, triumphing in our deliverance out of the Egyptian slavery of sin, and our preservation from the destroying sword of Divine justice, in the Lord's supper, which is our passover feast; as the whole Christian life is, and must be, the feast of the unleavened bread of sincerity and truth.