Matthew 24:16-21

then let those who are in Judea flee to the mountains [for refuge]. Whoever is on the housetop must not go down to get the things that are in his house [because there will not be enough time]. Whoever is in the field must not turn back to get his coat. And woe to those who are pregnant and to those who are nursing babies in those days! Pray that your flight [from persecution and suffering] will not be in winter, or on a Sabbath [when Jewish laws prohibit travel]. For at that time there will be a great tribulation (pressure, distress, oppression), such as has not occurred since the beginning of the world until now, nor ever will [again]. [Dan 12:1; Joel 2:2]