Webster(i)
17 Let him who is on the house-top not come down to take any thing out of his house:
18 Neither let him who is in the field return back to take his clothes.
19 And woe to them that are with child, and to them that nurse infants in those days!
20 But pray ye that your flight may not be in the winter, neither on the sabbath:
21 For then shall be great tribulation, such as hath not been since the beginning of the world to this time, no, nor ever shall be.