Bede the Venerable
Catena Aurea · Markusevangelium 11
And when even was come, he went out of the city. And in the morning, as they passed by, they saw the fig tree dried up from the roots. And Peter calling to remembrance saith unto him, Master, behold, the fig tree which thou cursedst is withered away. And Jesus answering saith unto them, Have faith in God. For verily I say unto you, That whosoever shall say unto this mountain, Be thou removed, and be thou cast into the sea; and shall not doubt in his heart, but shall believe that those things which he saith shall come to pass; he shall have whatsoever he saith. Therefore I say unto you, What things soever ye desire, when ye pray, believe that ye receive them, and ye shall have them. And when ye stand praying, forgive, if ye have ought against any: that your Father also which is in heaven may forgive you your trespasses. But if ye do not forgive, neither will your Father which is in heaven forgive your trespasses.
(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.