'Beacon' in the Bible

But Zeruiah's son Abishai came to David's aid, attacked the Philistine, and killed him. After this, David's army told him, "You're not going out anymore with us to battle, so Israel's beacon won't be extinguished!"

Therefore I cut them to pieces by the prophets, killing them by the words from my mouth. The verdict against you shines like a beacon.