Numbers 7:12

The Tribal Offerings

7:12 The one who presented his offering on the first day was Nahshon son of Amminadab, from the tribe of Judah. ¹ 

Numbers 10:14

10:14 The standard ²  of the camp of the Judahites set out first according to their companies, and over his company was Nahshon son of Amminadab.

[7:12]  ¹ sn The tribe of Judah is listed first. It seems that it had already achieved a place of prominence based on the patriarchal promise of the Messiahship in Judah (Gen 49:10).

[10:14]  ² sn The “standard” (דֶּגֶל, degel) was apparently some kind of a symbol put up on a pole to signify the tribal hosts. R. de Vaux thought it simply referred to a pole or a mast, but that would not distinguish tribes (Ancient Israel, 226-27).