Commentaries:
Barnes' Notes
Then let them ... - Then Christians may know that the end is come, and should seek a place of safety. Destruction would not only visit the "city," but would extend to the surrounding part of Judea.
The mountains - The mountains of Palestine abound in caves, a safe retreat for those who are pursued. In all ages these caves have been the favorite places of robbers, and they were also resorted to by those in danger, I Samuel 13:6; I Samuel 22:1; II Samuel 23:13; Joshua 10:16. In those mountains they would be safe.
Other Barnes' Notes entries containing Matthew 24:16:
Psalms 11:1
Isaiah 22:5
Isaiah 66:19
Jeremiah 21:9
Haggai 2:6
Mark 1:14
Luke 17:32
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