וַיַּקְרֵ֞ב אֶת־שֵׁ֤בֶט בִּנְיָמִן֙ למשפחתו [לְמִשְׁפְּחֹתָ֔יו] וַתִּלָּכֵ֖ד מִשְׁפַּ֣חַת הַמַּטְרִ֑י וַיִּלָּכֵד֙ שָׁא֣וּל בֶּן־קִ֔ישׁ וַיְבַקְשֻׁ֖הוּ וְלֹ֥א נִמְצָֽא׃
And he brought the tribe of Benjamin near by their families, and the family of the Matrites was taken; and Saul the son of Kish was taken; but when they sought him, he could not be found.
Read halakhic rulings (Jewish law) on I Samuel 10:21 from the Mishneh Torah and classical halakhic sources, free online.