Now the first day of the feast of unleavened bread,.... There were seven of these days, and this was the first of them, in which the Jews might not eat leavened bread, from the fourteenth, to the twenty first of the month Nisan; in commemoration of their being thrust out of Egypt, in so much haste, that they had not time to leaven the dough, which was in their kneading troughs: wherefore, according to their canons , on the night of the fourteenth day; that is, as Bartenora explains it, the night, the day following of which is the fourteenth, they search for leaven in all private places and corners, to bring; it out, and burn it, or break it into small pieces, and scatter it in the wind, or throw it into the sea.
Mark adds, "when they killed the passover", Mr 14:12; and Luke says, "when the passover must be killed", Lu 22:7; which was to be done on the fourteenth day of the month Nisan, after the middle of the day; and this was an indispensable duty, which all were obliged to: for so they say ,"every man, and every woman, are bound to observe this precept; and whoever makes void this commandment presumptuously, if he is not defiled, or afar off, lo!
he is guilty of cutting off.''The time of killing the passover was after the middle of the day; and it is said that"if they killed it before the middle of the day it was not right; and they did not kill it till after the evening sacrifice, and after they had offered the evening incense; and after they had trimmed the lamps, they began to slay the passovers, or paschal lambs, unto the end of the day; and if they slayed after the middle of the day, before the evening sacrifice, it was right.'
'The reason of this was, because the lamb was to be slain between the two evenings; the first of which began at noon, as soon as ever the day declined: and this was not done privately, but in the temple; for thus it is affirmed,"they do not kill the passover but in the court, as the rest of the holy things.'
'The time and manner of killing the lamb, and by whom, of the sprinkling of the blood, and of their flaying it, and taking out the fat, and burning it on the altar, may be seen in the Misna .