Matthew 17:20
And Jesus said unto them, Because of your unbelief: for verily I say unto you, If you have faith as a grain of mustard seed, you shall say unto this mountain, Remove from here to yonder place; and it shall remove; and nothing shall be impossible unto you.
Luke 17:6
And the Lord said, If you had faith as a grain of mustard seed, you could say unto this sycamine tree, Be plucked up by the root, and be planted in the sea; and it would obey you.
Matthew 13:31
Another parable put he forth unto them, saying, The kingdom of heaven is like to a grain of mustard seed, which a man took, and sowed in his field:
Matthew 21:21
Jesus answered and said unto them, Verily I say unto you, If you have faith, and doubt not, you shall not only do this which is done to the fig tree, but also if you shall say unto this mountain, Be removed, and be cast into the sea; it shall be done.
Mark 11:23
For verily I say unto you, That whosoever shall say unto this mountain, Be removed, and be cast into the sea; and shall not doubt in his heart, but shall believe that those things which he said shall come to pass; he shall have whatsoever he said.
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 unto him, If you can believe, all things are possible to him that believes.
Matthew 14:30-31
But when he saw the wind boisterous, he was afraid; and beginning to sink, he cried, saying, Lord, save me.
Matthew 17:9
And as they came down from the mountain, Jesus charged them, saying, Tell the vision to no man, until the Son of man be risen again from the dead.
Matthew 17:17
Then Jesus answered and said, O faithless and perverse generation, how long shall I be with you? how long shall I endure you? bring him here to me.
Mark 4:31
It is like a grain of mustard seed, which, when it is sown in the earth, is less than all the seeds that be in the earth:
Luke 1:37
For with God nothing shall be impossible.
Luke 18:27
And he said, The things which are impossible with men are possible with God.
John 11:40
Jesus said unto her, Said I not unto 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 the gifts of healing by the same Spirit;
Hebrews 3:19
So we see that they could not enter in because of unbelief.