John Gill Reformed Baptist @doctorgill

Neither let him which is in the field,.... Ploughing, or sowing, or employed in any other parts of husbandry, or rural business, return back to take clothes; for it was usual to work in the fields without their clothes, as at ploughing and sowing. Hence those words of Virgil (e).

Albert Barnes Presbyterian @notesbybarnes

Verse 18. Return back to take his clothes. His clothes which, in working, he had laid aside; or which in fleeing he should throw off as an incumbrance. Clothes here means the outer garment, commonly laid aside when men worked, or ran. . These directions were followed.

Geneva Bible Notes Reformed @genevanotes

Neither let him which is in the field return back to take his clothes. (g) This is a sign of how great the fear will be.