en_tn/1ki/09/10.md

It came about

This phrase is used here to mark the beginning of a new part of the story. If your language has a way of doing this, you could consider using it here.

at the end of twenty years

"after 20 years"

Solomon had finished building

It might be best to translate so that the reader understands that other people helped Solomon do this. (See: rc://en/ta/man/jit/figs-synecdoche)