Judg 12:9

וַיְהִי־ל֞וֹ שְׁלֹשִׁ֣ים בָּנִ֗ים וּשְׁלֹשִׁ֤ים בָּנוֹת֙ שִׁלַּ֣ח הַח֔וּצָה וּשְׁלֹשִׁ֣ים בָּנ֔וֹת הֵבִ֥יא לְבָנָ֖יו מִן־הַח֑וּץ וַיִּשְׁפֹּ֥ט אֶת־יִשְׂרָאֵ֖ל שֶׁ֥בַע שָׁנִֽים׃

He had thirty sons, as well as thirty daughters whom he gave in marriage to men outside his clan; and for his sons he brought back thirty wives from elsewhere. Ibzan judged Israel seven years.