Charles Ellicott Commentary Luke 21:7

"And they asked him, saying, Teacher, when therefore shall these things be? and what [shall be] the sign when these things are about to come to pass?" — Luke 21:7 (ASV)

Master, but when shall these things be?—See Notes on Matthew 24:3-14; Mark 13:3–13. St. Luke omits the Mount of Olives as being the scene of the question and the prophecy, and the names of the questioners, the latter being given by St. Mark only. The variations in the report throughout imply an independent source—probably oral—of information, as distinct from transcription either from one of the Gospels or from a document common to both of them. On the whole, he agrees much more with St. Mark than St. Matthew.