Patristic Evidence: Is the Ancient of Days in Daniel 7 a Vision of the Father?
Hippolytus (c. 170 – c. 236 A.D.)
"I saw in the night visions, and behold one like the Son of man came with the clouds of heaven, and came to the Ancient of days, and was brought near before Him..."… He showed all power given by the Father to the Son, who is ordained Lord of things in heaven, and things on earth, and things under the earth, and Judge of all."
(From: St. Hippolytus, Treatise on Christ and Antichrist, ANF vol. 5, p. 209)