'Colts' in the Bible

thirty milch camels and their colts, forty cows 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 Havvoth-jair unto this day, which are in the land of Gilead.

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