Charles Ellicott Commentary Luke 21:37

"And every day he was teaching in the temple; and every night he went out, and lodged in the mount that is called Olivet." — Luke 21:37 (ASV)

In the day time ... at night.—Literally, in the days ... the nights, the words pointing to the mode in which the week was spent from the first day to the evening of the fifth.

Abode.—The word is better translated lodged in Matthew 21:12. Strictly speaking, it meant to lodge, not in a room, but in the courtyard of a house; and so was used generally, in military language, for a “bivouac.” It would seem to have been chosen by both Evangelists (it does not occur elsewhere in the New Testament) to include the fact, implied in all four and definitely stated by St. John, that most of the nights were spent not in a house, but in the garden, or orchard, of Gethsemane (John 18:1–2).

That is called the mount of Olives.—Better, perhaps, here, as in Luke 19:29 (where see Note), that is called Olivet.