en_tn/2ch/26/02.md

It was he who rebuilt Elath

Uzziah did not do this alone. Alternate translation: "It was he who ordered Elath to be rebuilt" or "It was he who supervised the rebuilding of Elath" (See: rc://en/ta/man/jit/figs-synecdoche)

Elath

a city in Judah (See: rc://en/ta/man/jit/translate-names)

restored it to Judah

"returned it to Judah." This means that his army captured the city so that now it belonged to Judah again.

lay down with his ancestors

This is a polite way to say he died. (See: rc://en/ta/man/jit/figs-euphemism)