Numbers 1:32-34

321Of the sons of Joseph, namely, of the sons of Ephraim, their descendants by their families, by their fathers’ households, according to the number of names, from twenty years old and upward, whoever was able to go to war, 33their numbered men of the tribe of Ephraim were 40,500.

342Of the sons of Manasseh, their descendants by their families, by their fathers’ households, according to the number of names, from twenty years old and upward, whoever was able to go to war,