'Fortress' in the Bible

therefore watch out! I'm coming to get you! I'm going to attack your waterways, and then I'm going to make the land of Egypt a total wasteland from the Aswan fortress to the border of Ethiopia!

"This is what the LORD says: "Those who are supporting Egypt will fall; her majestic strength that she brought from the Aswan fortress will collapse by the sword that invades her,' declares the Lord GOD.

I'll pour out my anger on Sin, Egypt's strong fortress, and I'll eliminate the gangs in Thebes.