NET
14 In this initial skirmish Jonathan and his armor-bearer struck down about twenty men in an area that measured half an acre.
Darby
14 And that first slaughter which Jonathan and his armour-bearer wrought was about twenty men, as it were on the half-furrow of an acre of land.
KJV
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].