'Fortress' in the Bible

The fortress will disappear from Ephraim, and royal authority from Damascus; the survivors from Aram will be like the glory of the Israelis," declares the LORD of the Heavenly Armies.

Be ashamed, Sidon, because the sea has spoken, the fortress of the sea: I have neither been in labor nor given birth, I have neither reared young men nor brought up young women."

this is the one who will live on the heights; his refuge will be a mountain fortress. His food will be supplied, and his water will be guaranteed.