Luke 21:7

7 They asked him, "Rabbi, if this is so, when will these events take place? And what sign will show that they are about to happen?"

Luke 21:7 Meaning and Commentary

Luke 21:7

And they asked him
That is, his disciples, when they were come to the Mount of Olives, and as he sat upon that, ( Matthew 24:3 ) saying, master, but when shall these things be?
when the temple shall be destroyed; and one stone shall not be left upon another; and what sign [will there be] when these things shall come to
pass?
which shows that this refers to the destruction of the temple, and so the signs following; (See Gill on Matthew 24:3).

Luke 21:7 In-Context

5 As some people were remarking about the Temple, how beautiful its stone work and memorial decorations were, he said,

6 "The time is coming when what you see here will be totally destroyed -- not a single stone will be left standing!"

7 They asked him, "Rabbi, if this is so, when will these events take place? And what sign will show that they are about to happen?"

8 He answered, "Watch out! Don't be fooled! For many will come in my name, saying, `I am he!' and, `The time has come!' Don't go after them.

9 And when you hear of wars and revolutions, don't panic. For these things must happen first, but the end will not follow immediately."