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.