Romans 4:19
Abraham's faith did not become weak [even though] he was about one hundred years old and considered his body almost dead and Sarah's womb incapable of conceiving a child.
Matthew 6:30
So, if God so [beautifully] dresses the grass in a field, which is [green] today, and [then] tomorrow [dries up and] is thrown in the oven [i.e., as fuel], will He not do even more in providing your clothing, you people with such little faith?
Matthew 8:26
And He called to them, "Why are you [so] afraid? You have such little faith!" Then He stood up and sternly commanded the wind and the waves, and they became very calm.
Matthew 14:31
And immediately Jesus stretched out His hand and took hold of him and said, "You have such little faith; why did you doubt?"
Mark 9:23-24
And Jesus said to him, "'If you can.' [Note: By repeating the man's words Jesus seems to be saying, "You mean, if YOU can believe"]. Everything is possible to the person who believes [it can happen]."
John 20:27-28
Then He said to Thomas, "Put your finger here [i.e., to touch the nail scars] and look at my hands. Reach out your hand and put it into my side [i.e., where the spear had pierced Him]. Stop doubting and believe [that it is really I]."
Romans 4:20-21
Yet he looked for the promise of God [to be fulfilled] and did not waver, doubting [that it would happen], but his faith strengthened him. He honored God
Romans 14:21
[So], it is better [for you] not to eat bread, nor to drink wine, nor to do anything [else] that could cause your brother to fall [away from God].
Hebrews 11:11-19
By [having] faith, Sarah herself received the ability to have children, even though she was [sterile, being] past the age of child-bearing, since she considered God faithful to His promise. [Note: Some translations consider "Abraham" to be the subject of this highly controversial verse. See Lightfoot, pages 222-225].