'Ancient of Days' in the Bible

I was seeing till that thrones have been thrown down, and the Ancient of Days is seated, His garment as snow is white, and the hair of his head is as pure wool, His throne flames of fire, its wheels burning fire.

I was seeing in the visions of the night, and lo, with the clouds of the heavens as a son of man was one coming, and unto the Ancient of Days he hath come, and before Him they have brought him near.

till that the Ancient of Days hath come, and judgment is given to the saints of the Most High, and the time hath come, and the saints have strengthened the kingdom.