Matthew 17:20
And Jesus said to them, Because of your unbelief. For truly I say to you, If you have faith like a grain of mustard seed, you shall say to this mountain, Move from here to there. And it shall move. And nothing shall be impossible to you.
Luke 17:6
And the Lord said, If you had faith as a grain of mustard seed, you might say to this sycamine tree, Be rooted up and be planted in the sea! And it would obey you.
Matthew 13:31
He put out another parable to them, saying, The kingdom of Heaven is like a grain of mustard seed, which a man took and sowed in his field;
Matthew 21:21
Jesus answered and said to them, Truly I say to you, If you have faith and do not doubt, you shall not only do this miracle of the fig tree, but also; if you shall say to this mountain, Be moved and be thrown into the sea; it shall be done.
Mark 11:23
For truly I say to you that whoever shall say to this mountain, Be moved and be cast into the sea, and shall not doubt in his heart, but shall believe that what he said shall occur, he shall have whatever he said.
1 Corinthians 13:2
And though I have prophecies, and understand all mysteries and all knowledge; and though I have all faith, so as to move mountains, and do not have charity, I am nothing.
Mark 9:23
Jesus said to him, If you can believe, all things are possible to him who believes.
Matthew 14:30-31
But seeing that the wind was strong, 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 commanded them, saying, Tell the vision to no one until the Son of Man has risen 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 suffer 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 are 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 answered her, Did I not say to you that if you would believe you would see the glory of God?
1 Corinthians 12:9
and to another faith by the same Spirit; and 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.