Glossa Ordinaria
Catena Aurea · Matthäusevangelium 17
Then came the disciples to Jesus apart, and said, Why could not we cast him out? And Jesus said unto them, Because of your unbelief: for verily I say unto you, If ye have faith as a grain of mustard seed, ye shall say unto this mountain, Remove hence to yonder place; and it shall remove; and nothing shall be impossible unto you. Howbeit this kind goeth not out but by prayer and fasting.
(interlin.) So that the sense then is, Ye shall say to this mountain, that is to the proud devil, Remove hence, that is from the possessed body into the sea, that is into the depths of hell, and it shall remove, and nothing shall be impossible to you, that is, no sickness shall be incurable.