The New John Gill Exposition of the Entire BibleLuke 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,
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
which shows that this refers to the destruction of the
temple, and so the signs following; (See Gill on 24:3).