Matthew 17:20
He told them, "It was because of your little faith. I tell you the truth, if you have faith the size of a mustard seed, you will say to this mountain, 'Move from here to there,' and it will move; nothing will be impossible for you."
Luke 17:6
So the Lord replied, "If you had faith the size of a mustard seed, you could say to this black mulberry tree, 'Be pulled out by the roots and planted in the sea,' and it would obey you.
Matthew 13:31
He gave them another parable: "The kingdom of heaven is like a mustard seed that a man took and sowed in his field.
Matthew 21:21
Jesus answered them, "I tell you the truth, if you have faith and do not doubt, not only will you do what was done to the fig tree, but even if you say to this mountain, 'Be lifted up and thrown into the sea,' it will happen.
Mark 11:23
I tell you the truth, if someone says to this mountain, 'Be lifted up and thrown into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him.
1 Corinthians 13:2
And if I have prophecy, and know all mysteries and all knowledge, and if I have all faith so that I can remove mountains, but do not have love, I am nothing.
Mark 9:23
Then Jesus said to him, "'If you are able?' All things are possible for the one who believes."
Matthew 14:30-31
But when he saw the strong wind he became afraid. And starting to sink, he cried out, "Lord, save me!"
Matthew 17:9
As they were coming down from the mountain, Jesus commanded them, "Do not tell anyone about the vision until the Son of Man is raised from the dead."
Matthew 17:17
Jesus answered, "You unbelieving and perverse generation! How much longer must I be with you? How much longer must I endure you? Bring him here to me."
Mark 4:31
It is like a mustard seed that when sown in the ground, even though it is the smallest of all the seeds in the ground --
Luke 1:37
For nothing will be impossible with God."
Luke 18:27
He replied, "What is impossible for mere humans is possible for God."
John 11:40
Jesus responded, "Didn't I tell you that if you believe, you would see the glory of God?"
1 Corinthians 12:9
to another faith by the same Spirit, and to another gifts of healing by the one Spirit,
Hebrews 3:19
So we see that they could not enter because of unbelief.