John Gill Commentary Mark 13:16

"and let him that is in the field not return back to take his cloak." — Mark 13:16 (ASV)

And let him that is in the field
At work, in any sort of business there,

not turn back again :
either to his own house, or rather to that part of the field where he laid down his clothes:

for to take up his garment ;
but let him flee without it, or otherwise he would be in great danger; (See Gill on Matthew 24:18).