Numbers 10:18-20

¹⁸Then came the divisions of Reuben who marched out under their flag, with Elizur, son of Shedeur, in charge.

¹⁹Shelumiel, son of Zurishaddai, was in charge of the tribal division of Simeon,

²⁰and Eliasaph, son of Deuel, was in charge of the tribal division of Gad.