Hilary of Poitiers

The Lord therefore commends their faith, in that He says that they are able to suffer martyrdom together with Him; but, To sit on my right hand and on my left is not mine to give, but for whom it is prepared of my Father, Though indeed, as far as we can judge, that honour is so set apart for others, as that the Apostles shall not be strangers to it, who shall sit on the throne of the Twelve Patriarchs to judge Israel; also, as may be collected out of the Gospels themselves, Moses and Elias shall sit with them in the kingdom of heaven, seeing that it was in their company that He appeared on the mount in His apparel of splendour.