'Have Faith' in the Bible

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.

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.

And answering Jesus said to them, Have faith of God.

Do you have faith? Have it to yourself before God. Blessed is he who does not condemn himself in what he approves.

But someone will say, You have faith, and I have works. Show me your faith without your works, and I will show you my faith from my works.