Luke 21:20 (KJV) And when ye shall see Jerusalem compassed with armies, then know that the desolation thereof is nigh.
21 Then let them which are in Judaea flee to the mountains; and let them which are in the midst of it depart out; and let not them that are in the countries enter thereinto.
22 For these be the days of vengeance, that all things which are written may be fulfilled.
23 But woe unto them that are with child, and to them that give suck, in those days! for there shall be great distress in the land, and wrath upon this people.
24 And they shall fall by the edge of the sword, and shall be led away captive into all nations: and Jerusalem shall be trodden down of the Gentiles, until the times of the Gentiles be fulfilled.
Some rest on Saturday, some rest on Sunday. When Jerusalem was being surrounded by an army, the residents were supposed to flee for their lives, not turning back for their possessions. The Roman army laid siege to Jerusalem in 70 AD. They began about the time of Passover to entrap Jewish pilgrims in town for the festival. The Jewish historian Flavius Josephus recorded an account of this military campaign. General Titus cut off their supply routes, starved the Jews, then destroyed their city using catapults, siege ramps and rams. The Jewish Christians who saw the army approaching had a brief chance to flee. By one account they fled to the mountains around Pella in Jordan. This Roman campaign was the destruction of Jerusalem, not the end of the world. Jewish survivors were forced to work as slaves.