'Citadel' in the Bible

Arise, and let us attack by night, and let us destroy her citadel fortresses."

This is what the Lord says:I will certainly restore the fortunes of Jacob’s tentsand show compassion on his dwellings.Every city will be rebuilt on its mound;every citadel will stand on its proper site.

"And I will kindle a fire at the wall of Damascus, and it will devour the citadel fortresses of Ben-hadad."