Asa slept with his ancestors, dying in

The phrase "slept with his ancestors" is a euphemism for dying. Alternate translation: "Asa died during" (See: rc://en/ta/man/jit/figs-euphemism)

in the forty-first year of his reign

"in year 41 of his reign" or "when he reigned almost 41 years" (See: rc://en/ta/man/jit/translate-ordinal and rc://en/ta/man/jit/translate-numbers)