'Pair' in the Bible

When he sees riders, a pair of horsemen, riders of donkeys, riders of camels, {then} he must listen attentively, paying attention, paying {special} attention."

And look [at] this! A man's a chariot [is] coming, a pair of horsemen!" Then he responded and said, "It has fallen! Babylon has fallen! And all the images of her gods are smashed on the ground!"

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