Matthew 17:17
Then Jesus answering said, O unbelieving and perverse generation, how long shall I be with you? How long shall I suffer you?
Matthew 17:20
And Jesus said to them, Because of your unbelief. For verily I say to you, If ye have faith as a grain of mustardseed, ye shall say to this mountain, Remove hence to yonder place, and it shall remove, and nothing shall be impossible to you.
Luke 1:20
And behold, thou shalt be deaf, and not able to speak, till the day that these things are done, because thou believedst not my words, which shall be fulfilled in their season.
Luke 1:45
And happy is she that believed; for there shall be a performance of those things which were told her from the Lord.
John 1:17
but grace and truth was by Jesus Christ.
Romans 4:20
He staggered not at the promise of God through unbelief, but was strengthened in faith, giving glory to God,
1 Peter 3:15
And be always ready to give an answer to every one that asketh you a reason of the hope that is in you, with meekness and fear: