And ye shall keep it up until the fourteenth day of the same month: and the whole assembly of the congregation of Israel shall kill it in the evening. Ye shall keep it up until the fourteenth day - The lamb or kid was to be taken from the flock on the tenth day, and kept up and fed by itself till the fourteenth day, when it was to be sacrificed. This was never commanded nor practiced afterwards. The rabbins mark four things that were required in the first passover that were never required afterwards:
1. The eating of the lamb in their houses dispersed through Goshen.
2. The taking the lamb on the tenth day.
3. The striking of its blood on the door posts and lintels of their houses. And,
4. Their eating it in haste. These things were not required of the succeeding generations.
The whole assembly - shall kill it - Any person might kill it, the sacrificial act in this case not being confined to the priests.
In the evening - בין הערבים beyn haarbayim, "between the two evenings." The Jews divided the day into morning and evening: till the sun passed the meridian all was morning or fore-noon; after that, all was afternoon or evening. Their first evening began just after twelve o'clock, and continued till sunset; their second evening began at sunset and continued till night, i.e., during the whole time of twilight; between twelve o'clock, therefore, and the termination of twilight, the passover was to be offered.
"The day among the Jews had twelve hours, John 11:9. Their first hour was about six o'clock in the morning with us. Their sixth hour was our noon. Their ninth hour answered to our three o'clock in the afternoon. By this we may understand that the time in which Christ was crucified began at the third hour, that is, at nine o'clock in the morning, the ordinary time for the daily morning sacrifice, and ended at the ninth hour, that is, three o'clock in the afternoon, the time of the evening sacrifice, Mark 15:25, Mark 15:33, Mark 15:34, Mark 15:37. Wherefore their ninth hour was their hour of prayer, when they used to go into the temple at the daily evening sacrifice, Acts 3:1; and this was the ordinary time for the passover. It is worthy of remark that God sets no particular hour for the killing of the passover: any time between the two evenings, i.e., between twelve o'clock in the day and the termination of twilight, was lawful. The daily sacrifice (see Exodus 29:38, Exodus 29:39) was killed at half past the eighth hour, that is, half an hour Before three in the afternoon; and it was offered up at half past the ninth hour, that is, half an hour After three. In the evening of the passover it was killed at half past the seventh hour, and offered at half past the eighth, that is, half an hour Before three: and if the evening of the passover fell on the evening of the Sabbath, it was killed at half past the Sixth hour, and offered at half past the Seventh, that is, half an hour Before two in the afternoon. The reason of this was, they were first obliged to kill the daily sacrifice, and then to kill and roast the paschal lamb, and also to rest the evening before the passover. Agreeably to this Maimonides says 'the killing of the passover is after mid-day, and if they kill it before it is not lawful; and they do not kill it till after the daily evening sacrifice, and burning of incense: and after they have trimmed the lamps they begin to kill the paschal lambs until the end of the day.' By this time of the day God foreshowed the sufferings of Christ in the evening of times or in the last days, Hebrews 1:2; 1 Peter 1:19, 1 Peter 1:20 : and about the same time of the day, when the paschal lamb ordinarily died, He died also, viz., at the ninth hour; Matthew 27:46-50." See Ainsworth.