וַיְהִ֗י הַמַּקְרִ֛יב בַּיּ֥וֹם הָרִאשׁ֖וֹן אֶת־קָרְבָּנ֑וֹ נַחְשׁ֥וֹן בֶּן־עַמִּינָדָ֖ב לְמַטֵּ֥ה יְהוּדָֽה׃
And he that presented his offering the first day was Nahshon the son of Amminadab, of the tribe of Judah;
Read halakhic rulings (Jewish law) on Numbers 7:12: and classical halakhic sources.