Matthew 17:20
Jesus said unto them, "Because of your unbelief. For I say verily unto you, if ye had faith as a grain of mustard seed, ye should say unto this mountain, remove hence to yonder place, and he should remove: Neither should any thing be impossible for you to do.
Luke 17:6
And the Lord said, "If ye had faith like a grain of mustard seed, and should say unto this sycamine tree, 'Pluck thyself up by the roots, and plant thyself in the sea': he should obey you.
Matthew 13:31
Another parable he put forth unto them saying, "The kingdom of heaven is like unto a grain of mustard seed, which a man taketh and soweth in his field, which is the least of all seeds.
Matthew 21:21
Jesus answered, and said unto them, "Verily I say unto you, if ye shall have faith, and shall not doubt, ye shall not only do that which I have done to the fig tree: but also if ye shall say unto this mountain, take thyself away, and cast thyself into the sea, it shall be done.
Mark 11:23
Verily I say unto you, that whosoever shall say unto this mountain, 'Take away thyself, and cast thyself into the sea'; and shall not waver in his heart, but shall believe that those things which he sayeth shall come to pass, whatsoever he sayeth shall be done to him.
1 Corinthians 13:2
And though I could prophesy, and understood all secrets, and all knowledge: yea, if I had all faith so that I could move mountains out of their places, and yet had no love, I were nothing.
Mark 9:23
And Jesus said unto him, "Yea if thou couldest believe, all things are possible to him that believeth."
Matthew 14:30-31
But when he saw a mighty wind, he was afraid. And as he began to sink, he cried, saying, "Master save me."
Matthew 17:9
And as they came down from the mountain, Jesus charged them, saying, "See that ye tell the vision to no man, till the son of man be risen again from death."
Matthew 17:17
Jesus answered and said, "O generation faithless, and crooked: how long shall I be with you? How long shall I suffer you? Bring him hither to me."
Mark 4:31
It is like a grain of mustard seed, which when it is sown in the earth, is the least of all seeds that be in the earth:
Luke 1:37
for with God can nothing be impossible."
Luke 18:27
And he said, "Things which are impossible with men are possible with God."
John 11:40
Jesus said unto her, "Said I not unto thee, that if thou didst believe, thou shouldest see the glory of God?"
1 Corinthians 12:9
to another is given faith, by the same spirit; to another the gifts of healing, by the same spirit;
Hebrews 3:19
And we see that they could not enter in, because of unbelief.