'Pair' in the Bible

Now in that day a man may keep alive a heifer and a pair of sheep;

When he sees chariots, each man with a pair of horses, riders on donkeys or riders on camels, let him pay attention, full attention."

Look! Here come riders, each man with a pair of horses!" They're shouting out the answer: "Babylon has fallen, has fallen, and they have shattered all the images of her gods on the ground!

Who has measured the waters in the hollow of His hand,And marked off the heavens by the span,And calculated the dust of the earth by the measure,And weighed the mountains in a balanceAnd the hills in a pair of scales?

Take [the] pair of mill stones and grind flour! Uncover your veil, strip off [your] skirt, uncover [your] thigh, pass through [the] rivers!