'Have Faith' in the Bible

And He saith to them, "Because of your little faith. For verily I say to you, if ye have faith as a grain of mustard seed, ye shall say to this mountain, 'Remove hence yonder,' and it will be removed, and nothing shall be impossible to you."

And Jesus, answering, said to them, "Verily I say to you, if ye have faith, and do not doubt, not only the withering of the fig tree shall ye accomplish, but, even if ye say to this mountain, 'Be lifted up, and be cast into the sea,' it shall be done.

And the Lord said, "If ye have faith as a grain of mustard seed, ye would say to this sycamine tree, 'Be rooted up, and be planted in the sea,' and it would obey you.

But some one will say, "You have faith, and I have works": show me your faith apart from your works, and I will show you my faith by my works.