'Colts' in the Bible

Thirty milch camels with their colts, forty kine, and ten bulls, twenty she asses, and ten foals.

And he had thirty sons that rode on thirty ass colts, and they had thirty cities, which are called Havothjair unto this day, which are in the land of Gilead.

And he had forty sons and thirty nephews, that rode on threescore and ten ass colts: and he judged Israel eight years.