Judg 12:14

וַיְהִי־ל֞וֹ אַרְבָּעִ֣ים בָּנִ֗ים וּשְׁלֹשִׁים֙ בְּנֵ֣י בָנִ֔ים רֹכְבִ֖ים עַל־שִׁבְעִ֣ים עֲיָרִ֑ם וַיִּשְׁפֹּ֥ט אֶת־יִשְׂרָאֵ֖ל שְׁמֹנֶ֥ה שָׁנִֽים׃

He had forty sons and thirty grandsons, who rode on seventy donkeys. And he judged Israel eight years.