The blood shall be a sign for you, on the houses where you are. And when I see the blood, I will pass over you, and no plague will befall you to destroy you, when I strike the land of Egypt.
Moses and Aaron here receive of the Lord what they were afterwards to deliver to the people concerning the ordinance of the passover, to which is prefixed an order for a new style to be observed in their months (Exo 12:1, Exo 12:2): This shall be to you the beginning of months.
Commenting on Exodus 12:1-20
And the blood shall be to you for a token upon the houses where you are,.... The blood of the passover lamb being sprinkled on the two sideposts and upper doorposts of the houses inhabited by the Israelites, or where they were eating the passover; this should be a sign or token to them of the Lord's making good his promises, to them, and so...
THE RITE OF THE PASSOVER. (Exo 12:11-14) thus shall ye eat it; with your loins girded, your shoes on your feet--as prepared for a journey. The first was done by the skirts of the loose outer cloth being drawn up and fastened in the girdle, so as to leave the leg and knee free for motion.
Commenting on Exodus 12:11-14