en_tn/1sa/03/20.md

All Israel

"All the people in Israel"

from Dan to Beersheba

This is a merism for "in every part of the land." Alternate translation: "from one end of the land to the other" or "from Dan in the very north to Beersheba in the very south" (See: rc://en/ta/man/translate/figs-merism)

Samuel was appointed

This can be stated in active form. Alternate translation: "Yahweh had appointed" (See: rc://en/ta/man/translate/figs-activepassive)