Matthew 24:20

Be not in the winter. Because the streams were then impassable torrents from the heavy rains and the weather cold and wet, hard on homeless people.

Neither on the sabbath. Because then the gates of the city were closed, preventing departure. History tells us that the army of Cestius Gallus enclosed Jerusalem in A.D. 67, then deterred by its strength, retired to Caesarea. This was the signal for which the church waited, and it then fled beyond the Jordan.
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