Isaiah 29:8

It shall even be as when an hungry man dreameth, and, behold, he eateth, the dream being so very vivid; but he awaketh, and his soul is empty, no real food having passed his lips; or as when a thirsty man dreameth, and, behold, he drinketh; but he awaketh, and, behold, he is faint, with his thirst unquenched, and his soul hath appetite, he is still longing for a cooling drink. So shall the multitude of all the nations be that fight against Mount Zion. They had thought it would be an easy matter to conquer Jerusalem, but they find themselves bitterly disappointed. The whole attempt of Assyria upon Jerusalem would be as if it had not been, would he as empty and unreal as the fabric of a dream. The same will finally be true of all the enemies of the real Mount Zion, of the Church of God. But since the people of Jerusalem would not accept the words of the prophet in firm faith, in glad acclaim, therefore he continues with sharp reproof.