Numbers 1:3-5

21st Century King James Version

³ from twenty years old and upward, all who are able to go forth to war in Israel. Thou and Aaron shall number them by their armies.

⁴ And with you there shall be a man of every tribe, every one head of the house of his fathers.

⁵ And these are the names of the men who shall stand with you: of the tribe of Reuben, Elizur the son of Shedeur;