1 Samuel 14:14

14:14 That first slaughter, which Jonathan and his armor bearer made, was about twenty men, within as it were half a furrow's length in an acre of land.
-World English Bible

Other Translation

14:14 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].
-King James Version