Judges 10:4

4And he had thirty sons who arode on thirty donkeys, and they had thirty cities, called Havvoth-jair to this day, bwhich are in the land of Gilead.

Judges 12:14

14He had forty csons and thirty grandsons, who drode on seventy donkeys, and he judged Israel eight years.

1 Samuel 25:20

20And as she rode on the donkey and came down under cover of the mountain, behold, David and his men came down toward her, and she met them.
Copyright information for ESV