'Fortress' in the Bible

But one of the descendants of her line will arise in his place, and he will come against their army and enter the fortress of the king of the North, and he will deal with them and display great strength.

“His sons will mobilize and assemble a multitude of great forces; and one of them will keep on coming and overflow and pass through, that he may again wage war up to his very fortress.

Forces from him will arise, desecrate the sanctuary fortress, and do away with the regular sacrifice. And they will set up the abomination of desolation.