Victorinus of Pettau — on Rev 4:4 (Victorinus On the Creation of the World)

“The day, as I have above related, is divided into two parts by the number twelve-by the twelve hours of day and night; and by these hours too, months, and years, and seasons, and ages are computed. Therefore, doubtless, there are appointed also twelve angels of the day and twelve angels of the night, in accordance, to wit, with the number of hours. For these are the twenty-four witnesses of the days and nights which sit before the throne of God, having golden crowns on their heads, whom the Apocalypse of John the apostle and evangelist calls elders, for the reason that they are older both than the other angels and than men.”