American Standard Version (ASV):
And that first slaughter, which Jonathan and his armorbearer made, was about twenty men, within as it were half a furrow’s length in an acre of land.
King James Version (KJV):
And that first slaughter, which Jonathan and his armourbearer made, was about twenty men, within as it were an half acre of land, [which] a yoke [of oxen might plow].