Bede the Venerable — as excerpted in the Catena Aurea on Mark 11:19-26

“(ubi sup.) The Gentiles, who have attacked the Church, are in the habit of objecting to us, that we have never had full faith in God, for we have never been able to change mountains. 1It could, however, be done, if necessity called for it, as once we read that it was done by the prayers of the blessed Father Gregory of Neocæsarea, Bishop of Pontus, by which a mountain left as much space of ground for the inhabitants of a city as they wanted.”