en_tn/2ki/13/13.md

Jehoash lay down with his ancestors

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

Jeroboam sat on his throne

Here "sat on his throne" refers to ruling as king. Alternate translation: "Jeroboam became king after him" or "Jeroboam began to rule after him" (See: rc://en/ta/man/jit/figs-metonymy)