shoulder-to-shoulder they fought together here:
close as a brace of wine-dark oxen matched in power,
dragging a bolted plow through packed fallow land
and the sweat rushes up at the roots of both their horns
and only the width of polished yoke keeps both beasts apart,
struggling up the furrow to cut the field’s last strip.
So both men stood their ground, bracing man-to-man.

– Homer

The Iliad, Book 13, lines 813-818. Great Ajax and Little Ajax fight alongside each other. Their closeness is compared in an epic simile to two oxen pulling a plow through fallow land.