Numbers 1:3-8

³From twenty years old and upward, all that are able to go forth to war in Israel: these shall ye number according to their armies, thou and Aaron.

⁴And with you there shall be one man each of every tribe; a man who is the head of his family division.

⁵And these are the names of the men that shall stand with you; of Reuben: Elizur the son of Shedeur.

⁶Of Simeon: Shelumiel the son of Zurishaddai.

⁷Of Judah: Nachshon the son of 'Amminadab.

⁸Of Issachar: Nethanel the son of Zuar.