Gospel of Matthew Chapter 25 Vs. 5

 The Parable of the Ten Virgins

Matthew 25:5 “While the bridegroom tarried, they all slumbered and slept.”

The bridegroom tarried... That is, while they waited for him. It was uncertain at what time he would come. He delayed longer than they expected.

they all slumbered... During the hours before midnight, they all became sleepy and slept. This circumstance is not to be pressed to prove that all Christians will be asleep, or cold and careless, when the Lord Jesus shall come. Many may be, but many also, will be looking for his coming. This circumstance is designed simply to show more clearly the duty of being ready (Mat. 25:13).

Slumbered and slept (ἐνύσταξαν καὶ ἐκάθευδον)

Slumbered is, literally, nodded. Note the variation of tense. Nodded is aorist, denoting a transient act, the initial stage of slumber. They dropped their heads. Slept is imperfect, of continuous slumber.

It is not, then, by the temptation to sleep that the interval tests the virgins, but by bringing out a difference which has existed all the while, though at the first it did not appear. All seemed alike at the beginning of the night. Had not every one of them a lamp, with oil in it, and were not the lights of all the ten brightly burning? Yes, and if the bridegroom had come at that hour, all would have seemed equally ready. But the Bridegroom tarries, and while He tarries the business of the night must go on. In this way time passes, till at an unexpected moment in the very middle of the night as it were, the cry is heard "Behold the Bridegroom cometh; go ye out to meet Him.

Israel in the Tribulation will know that Jesus’ coming is near, but not all will be spiritually prepared for it. His coming will be sudden, when it is not expected (Mat. 24:27, 24:39, 24:50).