'Have Faith' in the Bible

and Jesus says to them, On account of your unbelief. For truly I say unto you, If you have faith as a grain of mustard seed, you will say to this mountain, Remove hence to yonder place; and it shall remove; and nothing shall be impossible to you.

And Jesus responding said to them, Truly I say unto you, if you may have faith, and doubt not, not only shall you do that of the fig-tree, but you shall say to this mountain, Be thou taken up and cast into the sea, and it will be done.

And the Lord said, If you have faith as a grain of mustard seed. you should say to this sycamine tree, Be thou plucked up, and planted in the sea; and it would obey you.

But let those that have faithful masters not despise them, because they are brethren; but rather let them serve them, because they are the faithful and beloved who are partaking of the benefaction. Command these things and exhort them.

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