Matthew 17:20
He said to them, "Because of your unbelief. For most certainly I tell you, if you have faith as a grain of mustard seed, you will tell this mountain, 'Move from here to there,' and it will move; and nothing will be impossible for you.
Luke 17:6
The Lord said, "If you had faith like a grain of mustard seed, you would tell this sycamore tree, 'Be uprooted, and be planted in the sea,' and it would obey you.
Matthew 13:31
He set another parable before 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 them, "Most certainly I tell you, if you have faith, and don't doubt, you will not only do what was done to the fig tree, but even if you told this mountain, 'Be taken up and cast into the sea,' it would be done.
Mark 11:23
For most certainly I tell you, whoever may tell this mountain, 'Be taken up and cast into the sea,' and doesn't doubt in his heart, but believes that what he says is happening; he shall have whatever he says.
1 Corinthians 13:2
If I have the gift of prophecy, and know all mysteries and all knowledge; and if I have all faith, so as to remove mountains, but don't have love, 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 when he saw that the wind was strong, he was afraid, and beginning to sink, he cried out, saying, "Lord, save me!"
Matthew 17:9
As they were coming down from the mountain, Jesus commanded them, saying, "Don't tell anyone what you saw, until the Son of Man has risen from the dead."
Matthew 17:17
Jesus answered, "Faithless and perverse generation! How long will I be with you? How long will I bear with you? Bring him here to me."
Mark 4:31
It's like a grain of mustard seed, which, when it is sown in the earth, though it is less than all the seeds that are on the earth,
Luke 1:37
For everything spoken by God is possible."
Luke 18:27
But he said, "The things which are impossible with men are possible with God."
John 11:40
Jesus said to her, "Didn't I tell you that if you believed, you would see God's glory?"
1 Corinthians 12:9
to another faith, by the same Spirit; and to another gifts of healings, by the same Spirit;
Hebrews 3:19
We see that they were not able to enter in because of unbelief.