Numbers 1:19

These are those who were called of the congregation, the princes of the tribes of their fathers; they were the heads of the thousands of Israel.

Moses and Aaron took these men who are mentioned by name.

They assembled all the congregation together on the first day of the second month; and they declared their ancestry by their families, by their fathers’ houses, according to the number of the names, from twenty years old and upward, one by one.

The children of Reuben, Israel’s firstborn, their generations, by their families, by their fathers’ houses, according to the number of the names, one by one, every male from twenty years old and upward, all who were able to go out to war:

those who were counted of them, of the tribe of Reuben, were forty-six thousand five hundred.

Of the children of Simeon, their generations, by their families, by their fathers’ houses, those who were counted of it, according to the number of the names, one by one, every male from twenty years old and upward, all who were able to go out to war: