Judges 10:4

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

Jair ruled as one who feared the Lord. He worked to uphold the worship of God among Israel. His thirty sons helped him carry on the work of government. Their riding on thirty ass colts showed their office as magistrates, traveling from place to place to administer justice.