וַיִּיטַ֥ב בְּעֵינַ֖י הַדָּבָ֑ר וָאֶקַּ֤ח מִכֶּם֙ שְׁנֵ֣ים עָשָׂ֣ר אֲנָשִׁ֔ים אִ֥ישׁ אֶחָ֖ד לַשָּֽׁבֶט׃
And the thing pleased me well; and I took twelve men of you, one man for every tribe;
Read halakhic rulings (Jewish law) on Deuteronomy 1:23: and classical halakhic sources.