en_tn_condensed/1ch/26/13.md

threw lots

"cast lots"

both young and old

This refers to all of the men by describing the extremes. See how you translated a similar phrase in 1 Chronicles 25:8. Alternate translation: "all of them, including the young men and the old men" or "men of all ages" (See: rc://en/ta/man/translate/figs-merism)