John Gill 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
Of what these signs in the heaven, earth, and sea portend:

and for looking after those things which are coming on the earth ;
on the land of Judea:

for the powers of heaven shall be shaken ;
(See Gill on Matthew 24:29).