en_tn/1ki/11/28.md

a mighty man of valor

Possible meanings are 1) "a great warrior" or 2) "a very capable man" or 3) "a wealthy and influential man."

he gave him command

"he made him commander"

all the labor

The word "labor" refers to the work that Solomon commanded the people to do for his government. This is a metonym. (See: rc://en/ta/man/jit/figs-metonymy)

the house of Joseph

This refers to the descendants of Joseph who were the people groups of Ephraim and Manasseh. This is a metonym. (See: rc://en/ta/man/jit/figs-metonymy)