Matthew 26:17-21

The first [day] of the [feast of] unleavened bread. Strictly speaking, the 15th of Nisan (part of our March and April), after the paschal lamb was killed, but here the 14th day (Thursday). See Ex 12:16. This suggests one of the most difficult questions of Scripture chronology, whether the Lord at the passover one day before the regular Jewish passover, or at the usual time. Pressense, Milman Ellicott, Townsend, Alford, Neander, Farrar, and many other great authorities, hold that he ate it the day preceding, and died on the day and about the time the Jewish passover lambs were slain. The statements of John, that the supper was eaten, the Lord betrayed and condemned before the passover, seem positive (Joh 19:14).

Where wilt thou that we prepare . . . the passover? The passover must be eaten in the place where the Lord's name was recorded, or where the tabernacle or temple was located, according to the directions given in De 16:1-15.
Go into the city to such a man, etc. The disciples are directed to determine the place in the city by a certain sign (Mr 14:13). They do so and make ready in the guest chamber thus secured. When the even was come. The lamb was slain "between two evenings", that is, between three and five o'clock (see the margin of Ex 12:6 in the Revised Version). The supper followed on the same night. It was probably dark before the Savior and the twelve came to the guest chamber. The band that "sat down" to this supper and this occasion have furnished the subject of one of the greatest paintings ever created. One of you shall betray me. The meal, opened with "blessing", seems to have proceeded with solemn silence after it began, until the silence was broken by these startling words.
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