Luke 21:20

20 `And when ye may see Jerusalem surrounded by encampments, then know that come nigh did her desolation;

Luke 21:20 Meaning and Commentary

Luke 21:20

And when ye shall see Jerusalem compassed with armies
The Vulgate Latin, Syriac, and Persic versions read, "with an army"; that is, with the Roman army, as it was by the army which Titus Vespasian brought against it, and besieged it with:

then know that the desolation thereof is nigh;
signifying, that there would be no deliverance to be expected, as when the Assyrian army under Rabshakeh appeared against it; but that whenever the Roman army besieged it, its destruction might be looked upon as inevitable; nor was the siege raised until it was destroyed, which was about four years after.

Luke 21:20 In-Context

18 and a hair out of your head shall not perish;
19 in your patience possess ye your souls.
20 `And when ye may see Jerusalem surrounded by encampments, then know that come nigh did her desolation;
21 then those in Judea, let them flee to the mountains; and those in her midst, let them depart out; and those in the countries, let them not come in to her;
22 because these are days of vengeance, to fulfil all things that have been written.
Young's Literal Translation is in the public domain.