'Have Faith' in the Bible

He told them, "Because of your lack of faith. I tell all of you with certainty, if you have faith like a grain of mustard seed, you can say to this mountain, "Move from here to there,' and it will move, and nothing will be impossible for you.

Jesus answered them, "I tell all of you with certainty, if you have faith and do not doubt, not only will you be able to do what has been done to the fig tree, but you will also say to this mountain, "Be removed and thrown into the sea,' and it will happen.