Mark 13:3

And as he sat upon the mount of Olives over against the temple, Peter and James and John and Andrew asked him privately,

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.