Numbers 1:4-6

Amplified Bible

⁴ And with you there shall be a man [to assist you] from each tribe, each being the head of his father’s household. ⁵ These then are the names of the men who shall stand with you: from [the tribe of] Reuben, Elizur the son of Shedeur; ⁶ from [the tribe of] Simeon, Shelumiel the son of Zurishaddai;