Numbers 1:3-5

Expanded Bible

³ You and Aaron must count every man twenty years old or older who will serve in the army of Israel, and list them by their divisions [^Clike a military registration]. ⁴ One man from each tribe, the leader of his family, will help you. ⁵ These are the names of the men who will help you:

from the tribe of Reuben—Elizur son of Shedeur;