Mark 9:23
And Jesus said to him, It is this, if you are able (to believe); all things are possible to him that believeth.
John 11:40
Jesus says to her; Did I not tell thee, that, if thou canst believe, thou shalt see the glory of God?
Matthew 17:20
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.
Mark 11:23
Truly I say unto you, That whosoever may say to this mountain, Be thou taken up and cast into the sea; and may not doubt in his heart, but believe that what he says does take place; it shall be unto him.
Luke 17:6
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.
Hebrews 11:6
but without faith it is impossible to please him: for it behooves the one coming unto God to believe that he is, and he is a rewarder unto them who seek him out.
Matthew 21:21-22
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.
John 4:48-50
Then Jesus said to him, Unless you may see signs and wonders, you can not believe.
Acts 14:9
He heard Paul speaking, who fixing his attention on him, and seeing that he had faith to be saved,