Reference: Harrow
Easton
(Heb harits), a tribulum or sharp threshing sledge; a frame armed on the under side with rollers or sharp spikes (2Sa 12:31; 1Ch 20:3).
Heb verb sadad, to harrow a field, break its clods (Job 39:10; Isa 28:4; Ho 10:11). Its form is unknown. It may have resembled the instrument still in use in Egypt.
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Fausets
charits 2Sa 12:31. Possibly a "threshing instrument." In modern Palestine no such instrument as our harrow exists, and it is unlikely it did in ancient times.
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Smith
Harrow.
The word so rendered,
is probably a threshing-machine. The verb rendered "to harrow,"
Job 39:10; Isa 28:24; Ho 10:11
expresses apparently the breaking of the clods, and is so far analogous to our harrowing --but whether done by any such machine as we call a "harrow" is very doubtful.