Charles Ellicott Commentary Luke 21:26

"men fainting for fear, and for expectation of the things which are coming on the world: for the powers of the heavens shall be shaken." — Luke 21:26 (ASV)

Men’s hearts failing them for fear.—The verb so rendered is used by St. Luke only in the New Testament. Its literal meaning is to breathe out the soul, and it was, therefore, a word which would naturally enter into the vocabulary of a physician, both in its primary and figurative sense. The mental state which it expresses exactly agrees with that described in Acts 27:20, in connection with the tempest.

For looking after those things.—Literally, for expectation, the noun being used only by St. Luke in the New Testament.