Judges 12:9
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.
World English Bible (Public Domain)
In context
Before · Judges 12:7–8
7Jephthah judged Israel six years. Then Jephthah the Gileadite died, and was buried in the cities of Gilead. 8After him Ibzan of Bethlehem judged Israel.
9He 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.