Judges 12:9 in the World English Bible
He had thirty sons. He sent his thirty daughters outside his clan, and he brought in thirty daughters from outside his clan for his sons. He judged Israel seven years.
Context
8 And after him Ibzan of Beth-lehem judged Israel.
9 And he had thirty sons, and thirty daughters, whom he sent abroad, and took in thirty daughters from abroad for his sons. And he judged Israel seven years.
10 Then died Ibzan, and was buried at Beth-lehem.