They reap every one his corn in the field - This is perfectly characteristic. These wandering hordes often make sudden irruptions, and carry off the harvest of grain, olives, vines, etc., and plunge with it into the wilderness, where none can follow them. The Chaldee gives the same sense: "They reap in a field that is not their own, and cut off the vineyard of the wicked."
They reap every one his corn - Margin, “mingled corn,” or “dredge.” The word used here (בליל belı̂yl ) denotes, properly, “meslin,” mixed provender, made up of various kinds of grain, as of barley, vetches, etc., prepared for cattle; see the notes at Isaiah 30:24.
In the field - They break in upon the fields of others, and rob them of their grain, instead of cultivating the earth themselves. So it is rendered by Jerome - Agrum non suum deme-runt; et vineam ejus, quem vi. oppresserint vindemiant. The Septuagint renders it, “A field, not their own, they reap down before the time - πρὸ ὥρας pro hōras They gather the vintage of the wicked - Margin, “the wicked gather the vintage.” Rather, they gather the vintage of the oppressor. It is not the vintage of honest industry; not a harvest which is the result of their own labor, but of plunder. They live by depredations on others. This is descriptive of those who support themselves by robbery.