John Gill Commentary Mark 13

And as he went out of the temple
The Ethiopic version reads, "as they went out"; Christ and his disciples: for when Christ went out of the temple, the disciples went out with him; or at least very quickly followed him, and came to him, as appears from what follows; though the true reading is, "as he went out": and the Syriac and Persic versions are more express, and read, "as Jesus went out": for having done all he intended to do there, he left it, never more to return to it:

one of his disciples :
it may be Peter, who was generally pretty forward, and commonly the mouth of the rest, as this disciple was, whoever he was: the Persic version reads, "the disciples"; and Matthew and Luke represent them in general, as observing to Christ, the beauty and grandeur of the temple, as this disciple did: who

says unto him, Master, see what manner of stones and what
buildings [are here] .
The temple, as repaired by Herod, was a very beautiful building, according to the account the Jews give of it, and its stones were of a very great magnitude; (See Gill on Matthew 24:1).

And Jesus answering said to him
The Persic version reads, "to them"; and so Beza's most ancient copy but as that question is put by one,the reply is made to him:

Do you see these great buildings ?
how beautiful and strong they are. The Vulgate Latin and Ethiopic versions, add the word all; and the senseis, Do you take a survey of all these buildings, and of the whole of this stately edifice? And do younot admire the strength and grandeur of them? And do you not think they will be of long duration, and thatthe demolition of them is scarcely possible?

There shall not be left one stone upon another .
The Syriac and Arabic versions add, "here": as in (Matthew 24:9) , and so it is read in four of Beza'scopies, and in others:

that shall not be thrown down; (See Gill on Matthew 24:2).

And as he sat upon the Mount of Olives
On the east of Jerusalem:

over against the temple :
where he could have a full view of it; the eastern wall of the temple being lower than the rest; (See Gill on Matthew 24:3).

Peter, and John, and James, and Andrew, asked him privately ;
apart from the rest of the disciples, they being, especially the first three, his favourites, and very familiar with him.

Tell us when shall these things be ?
&c.] When the temple will be destroyed, and these fine buildings shall be demolished, and not one of these large stones shall be left upon another:

and what shall be the sign when all these things [shall be]
fulfilled ?
And what is the sign of his coming, and of the end of the world, as Matthew relates; (See Gill on Matthew 24:3).

And Jesus answering them
His four disciples, Peter, John, James, and Andrew: "began to say"; or "said", a way of speaking frequent with this evangelist:

take heed lest any man deceive you; (See Gill on Matthew 24:4).