Isaiah 21:7

And I saw two mounted horsemen, and a rider on an ass, and a rider on a camel.

And he saw a chariot with a couple of horsemen, a chariot of asses, and a chariot of camels; and he hearkened diligently with much heed:

When he sees a troop, horsemen in pairs, a troop of donkeys, a troop of camels, he shall listen diligently with great attentiveness.”