Numbers 1:3-5

New American Standard Bible

³ from ^(A)twenty years old and upward, whoever is able to go to war in Israel. You and Aaron shall ^[a]count them by their armies. ⁴ With you, moreover, there shall be a man of each tribe, ^(B)each one head of his father’s household. ⁵ These then are the names of the men who shall stand with you: ^(C)of the tribe of Reuben, Elizur the son of Shedeur;