Charles Spurgeon Commentary Exodus 12:17-25

"And ye shall observe the [feast of] unleavened bread; for in this selfsame day have I brought your hosts out of the land of Egypt: therefore shall ye observe this day throughout your generations by an ordinance for ever. In the first [month], on the fourteenth day of the month at even, ye shall eat unleavened bread, until the one and twentieth day of the month at even. Seven days shall there be no leaven found in your houses: for whosoever eateth that which is leavened, that soul shall be cut off from the congregation of Israel, whether he be a sojourner, or one that is born in the land. Ye shall eat nothing leavened; in all your habitations shall ye eat unleavened bread. Then Moses called for all the elders of Israel, and said unto them, Draw out, and take you lambs according to your families, and kill the passover. And ye shall take a bunch of hyssop, and dip it in the blood that is in the basin, and strike the lintel and the two side-posts with the blood that is in the basin; and none of you shall go out of the door of his house until the morning. For Jehovah will pass through to smite the Egyptians; and when he seeth the blood upon the lintel, and on the two side-posts, Jehovah will pass over the door, and will not suffer the destroyer to come in unto your houses to smite you. And ye shall observe this thing for an ordinance to thee and to thy sons for ever. And it shall come to pass, when ye are come to the land which Jehovah will give you, according as he hath promised, that ye shall keep this service." — Exodus 12:17-25 (ASV)

And you shall observe the feast of unleavened bread, for on this very same day I have brought your armies out of the land of Egypt: therefore you shall observe this day in your generations by an ordinance forever. In the first month, on the fourteenth day of the month at evening, you shall eat unleavened bread, until the twenty-first day of the month at evening. Seven days shall there be no leaven found in your houses: for whoever eats that which is leavened, that soul shall be cut off from the congregation of Israel, whether he is a stranger, or born in the land. You shall eat nothing leavened; in all your habitations you shall eat unleavened bread. Then Moses called for all the elders of Israel, and said to them, ‘Select and take for yourselves a lamb according to your families, and kill the Passover.’ And you shall take a bunch of hyssop, and dip it in the blood that is in the basin, and strike the lintel and the two side posts with the blood that is in the basin; and none of you shall go out at the door of his house until the morning. For the LORD will pass through to smite the Egyptians; and when he sees the blood upon the lintel, and on the two side posts, the LORD will pass over the door, and will not allow the destroyer to come in to your houses to smite you. And you shall observe this thing for an ordinance to you and to your sons forever. And it shall come to pass, when you have come to the land which the LORD will give you, according as he has promised, that you shall keep this service.

What! Were they never to forget the slaying of the lamb and the sprinkling of the blood? No, never. Not when they came to Canaan, to the land that flowed with milk and honey, and when God had performed other great marvels for them? No, never; and the highest honor that we shall ever have will be this: to be able truthfully to sing:

"A monument of grace,
A sinner saved by blood."