MNT(i)
19 Thereupon Jesus' disciples came to him and asked him privately, "Why were we not able to cast it out?"
20 "Because of your little faith," he answered. "In solemn truth I tell you that if you have faith the size of a mustard-seed, you can say to this mountain, 'Move from this place to that!' and it will move; and nothing will be impossible to you.
21 "But this kind is driven out by prayer alone."