AUV(i)
17 [Also], the person who is on a housetop [Note: This was a flat area where people retired for rest, prayer, etc., with its stairway on the outside], is not to take any of the belongings from his house as he comes down [to flee].
18 The person who is in a field [i.e., doing farm work] is not [even] to return [to his house] to get his coat.
19 It will be too bad for those who are pregnant and who are nursing babies in those days.
20 And pray that it will not be in the winter or on a Sabbath day when you will have to flee [from the city]. [Note: Jewish Sabbath day restrictions on travel (only three-fifths of a mile) and city gate closures would make leaving the city nearly impossible].
21 There will be great trouble [during these times], such as had never been from the beginning of time up to the present, or ever will be [in the days to come].