Romans 4:19
and not being weak in faith, he considered not his own body already become dead, being about a hundred years old, and the deadening of Sarah's womb,
Genesis 17:17
And Abraham fell on his face and laughed, and said in his heart, Shall a child be born to him that is a hundred years old? and shall Sarah, who is ninety years old, bear?
Genesis 18:11-14
Now Abraham and Sarah were old and advanced in age: it had ceased to be with Sarah after the manner of women.
Matthew 6:30
But if God so clothe the herbage of the field, which is to-day, and to-morrow is cast into the oven, will he not much rather you, O ye of little faith?
Matthew 8:26
And he says to them, Why are ye fearful, O ye of little faith? Then, having arisen, he rebuked the winds and the sea, and there was a great calm.
Matthew 14:31
And immediately Jesus stretched out his hand and caught hold of him, and says to him, O thou of little faith, why didst thou doubt?
Mark 9:23-24
And Jesus said to him, The 'if thou couldst' is if thou couldst believe: all things are possible to him that believes.
John 20:27-28
Then he says to Thomas, Bring thy finger here and see my hands; and bring thy hand and put it into my side; and be not unbelieving, but believing.
Romans 4:20-21
and hesitated not at the promise of God through unbelief; but found strength in faith, giving glory to God;
Romans 14:21
It is right not to eat meat, nor drink wine, nor do anything in which thy brother stumbles, or is offended, or is weak.
Hebrews 11:11-19
By faith also Sarah herself received strength for the conception of seed, and that beyond a seasonable age; since she counted him faithful who promised.