Matthew 17:20
And Jesus said to them: Because of your unbelief. For verily I say to you, If you have faith like a grain of mustard-seed, you shall say to this mountain, Be removed from this place to that, and it shall be removed: and nothing shall be impossible for you.
Luke 17:6
And the Lord said: If you had faith like a grain of mustard, you might say to this sycamine-tree, Be uprooted, and be planted in the sea, and it should obey you.
Matthew 13:31
Another parable he laid before them, saying: The kingdom of heaven is like- a grain of mustard, that a man took and sowed in his field.
Matthew 21:21
Jesus answered and said to them: Verily I say to you, If you have faith, and doubt not, you shall do, not only what is done to the fig-tree, but even if you shall say to this mountain, Be taken up, and be thrown into the sea, it shall be done.
Mark 11:23
For, verily I say to you, that whoever will say to this mountain, Be removed, and be cast into the sea, and will not doubt in his heart, but believe that what he says will come to pass, he shall have whatever he says.
1 Corinthians 13:2
And though I have the gift of prophecy, and understand all mysteries, and all knowledge; and though I have all faith, so that I could remove mountains, and have not love, I am nothing.
Mark 9:23
Jesus said to him: If you are able to believe, all things are possible to him that believes.
Matthew 14:30-31
But when he saw the wind strong, he was afraid; and beginning to sink, he cried out, saying: Lord, save me.
Matthew 17:9
And as they came down from the mountain, Jesus charged them, saying: Tell the vision to no one, till the Son of man has risen from the dead.
Matthew 17:17
Jesus answered and said: faithless and perverse generation, how long shall I be with you? How long shall I bear with you? Bring him hither to me.
Mark 4:31
It is like a grain of mustard, which, when it is sown in the ground, is less than all seeds that are in the ground;
Luke 1:37
for nothing shall be impossible with God.
Luke 18:27
He replied: Things that are impossible with men, are possible with God.
John 11:40
Jesus said to her: Did I not tell you, that, if you would believe, you should see the glory of God?
1 Corinthians 12:9
to another, faith, by the same Spirit; to another, gifts of healing, by the same Spirit;
Hebrews 3:19
And so we see that they could not enter in because of unbelief.