Matthew 17:17
"O unbelieving and perverse generation!" replied Jesus; "how long shall I be with you? how long shall I endure you? Bring him to me."
Matthew 17:20
"Because your faith is so small," He replied; "for I solemnly declare to you that if you have faith like a mustard-seed, you shall say to this mountain, 'Remove from this place to that,' and it will remove; and nothing shall be impossible to you.
Luke 1:20
And now you will be dumb and unable to speak until the day when this has taken place; because you did not believe my words--words which will be fulfilled at their appointed time."
Luke 1:45
And blessed is she who has believed, for the word spoken to her from the Lord shall be fulfilled."
John 1:17
For the Law was given through Moses; grace and truth came through Jesus Christ.
Romans 4:20
Nor did he in unbelief stagger at God's promise, but became mighty in faith, giving glory to God,
1 Peter 3:15
but in your hearts consecrate Christ as Lord, being always ready to make your defence to any one who asks from you a reason for the hope which you cherish.