Commentaries:
Barnes' Notes
Him which is on the house-top - The roofs of the houses in Eastern countries were made flat, so that they were favorable places for walking and retirement. See the notes at Matthew 9:1-8. The meaning here is, that He who should be on the house-top when this calamity came upon the city "should flee without delay;" He should not even take time to secure any article of apparel from his house. So sudden would be the calamity, that by attempting to do this He would endanger his life.
Other Barnes' Notes entries containing Matthew 24:17:
Isaiah 66:19
Jeremiah 21:9
Luke 17:31
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