en_tn/psa/078/051.md

the firstborn of their strength

This phrase refers to the firstborn males of each family. Alternate translation: "the firstborn males" (See: rc://en/ta/man/jit/figs-idiom)

in the tents of Ham

Here the word "tents" is a metonym for families. The word "Ham" refers to Egypt by the name of their ancestor. Alternate translation: "among the families of Egypt" (See: rc://en/ta/man/jit/figs-metonymy)