Numbers 1:20

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

The descendants of Reuben, the firstborn of Israel: according to their family records by their clans and their ancestral families, counting one by one the names of every male twenty years old or more, everyone who could serve in the army,

This is the number of men twenty years old or older who were able to go to war, as their names were listed in the records of their clans and families:

Reuben (Jacob’s oldest son)

46,500

The descendants of Reuben, the firstborn of Israel, their genealogies according to their clans, according to their families, according to the number of names, every male individually from twenty years old and above, everyone who is able to go to war:

And the children of Reuben, Israel’s eldest son, by their generations, after their families, by the house of their fathers, according to the number of the names, by their polls, every male from twenty years old and upward, all that were able to go forth to war;