(17) Let him which is on the housetop.--The houses in the streets of Jerusalem were built in a continuous line, and with flat roofs, so that a man might pass from house to house without descending into the street until he came to some point near the wall or gate of the city, and so make his escape. At a moment of danger (in this case that arising from the factions within the city, rather than the invaders without), any delay might prove fatal. Men were to escape as though their life were "given them for a prey" (Jeremiah 45:5), without thinking of their goods or chattels.

Verse 17. - Housetop. This was fiat, and used as a place of rest, meditation, and familiar concourse (Matthew 10:27). Come down...house. The roof was accessible by two staircases, one external leading from the street or the country, the other mounting from the apartments. The householder was not to descend by this latter to carry off anything from his chambers within, but to escape at once by the outer staircase (setup. Luke 5:19). The flight was to be precipitate, like that of Lot from Sodom (cf. Luke 17:32). The warning was necessary, as, when the Zealots and assassins bad the upper hand, they allowed no one to leave the city. The warning, however, applied to dwellers in any part of Judaea.

24:4-28 The disciples had asked concerning the times, When these things should be? Christ gave them no answer to that; but they had also asked, What shall be the sign? This question he answers fully. The prophecy first respects events near at hand, the destruction of Jerusalem, the end of the Jewish church and state, the calling of the Gentiles, and the setting up of Christ's kingdom in the world; but it also looks to the general judgment; and toward the close, points more particularly to the latter. What Christ here said to his disciples, tended more to promote caution than to satisfy their curiosity; more to prepare them for the events that should happen, than to give a distinct idea of the events. This is that good understanding of the times which all should covet, thence to infer what Israel ought to do. Our Saviour cautions his disciples to stand on their guard against false teachers. And he foretells wars and great commotions among nations. From the time that the Jews rejected Christ, and he left their house desolate, the sword never departed from them. See what comes of refusing the gospel. Those who will not hear the messengers of peace, shall be made to hear the messengers of war. But where the heart is fixed, trusting in God, it is kept in peace, and is not afraid. It is against the mind of Christ, that his people should have troubled hearts, even in troublous times. When we looked forward to the eternity of misery that is before the obstinate refusers of Christ and his gospel, we may truly say, The greatest earthly judgments are but the beginning of sorrows. It is comforting that some shall endure even to the end. Our Lord foretells the preaching of the gospel in all the world. The end of the world shall not be till the gospel has done its work. Christ foretells the ruin coming upon the people of the Jews; and what he said here, would be of use to his disciples, for their conduct and for their comfort. If God opens a door of escape, we ought to make our escape, otherwise we do not trust God, but tempt him. It becomes Christ's disciples, in times of public trouble, to be much in prayer: that is never out of season, but in a special manner seasonable when we are distressed on every side. Though we must take what God sends, yet we may pray against sufferings; and it is very trying to a good man, to be taken by any work of necessity from the solemn service and worship of God on the sabbath day. But here is one word of comfort, that for the elect's sake these days shall be made shorter than their enemies designed, who would have cut all off, if God, who used these foes to serve his own purpose, had not set bounds to their wrath. Christ foretells the rapid spreading of the gospel in the world. It is plainly seen as the lightning. Christ preached his gospel openly. The Romans were like an eagle, and the ensign of their armies was an eagle. When a people, by their sin, make themselves as loathsome carcasses, nothing can be expected but that God should send enemies to destroy them. It is very applicable to the day of judgment, the coming of our Lord Jesus Christ in that day, 2Th 2:1. Let us give diligence to make our calling and election sure; then may we know that no enemy or deceiver shall ever prevail against us.Let him which is on the housetop,.... Who should be there either for his devotion or recreation; for the houses of the Jews were built with flat roofs and battlements about them, which they made use of both for diversion and pleasure, and for private meditation and prayer, for social conversation, and sometimes for public preaching; see Matthew 10:27

not come down to take anything out of his house: that is, let him not come down in the inner way, but by the stairs, or ladder, on the outside of the house, which was usual. They had two ways of going out of, and into their houses; the one they call (d), , "the way of the doors"; the other, , "the way of the roof": upon which the gloss is,

"to go up on the outside, , "by way" or "means" of a ladder, fixed at the entrance of the door of the upper room, and from thence he goes down into the house by a ladder;''

and in the same way they could come out; see Mark 2:4 and let him not go into his house to take any of his goods, or money, or food along with him necessary for his sustenance in his flight; lest, whilst he is busy in taking care of these, he loses his life, or, at least, the opportunity of making his escape; so sudden is this desolation represented to be.

(d) T. Bab. Bava Metzia, fol. 117. 1.