Matthew 11:16-17
But to whom shall I resemble this generation? it is like little boys sitting in the places of concourse, and calling to their companions,
Matthew 17:17
Then Jesus answering, said, O generation, faithless, and perverse! how long shall I be with you? how long shall I bear with you? bring him hither to me.
Mark 9:19
Then addressing him, he said, O faithless generation, how long shall I be with you? how long shall I bear with you? bring him to me.
Luke 7:31-32
And the Lord said, To what then shall I compare the men of this generation? and to what are they like?
Luke 18:8
Yes, I tell you, that he will avenge them quickly. Nevertheless when the Son of man cometh, ah! shall he find faith on the earth?
2 Thessalonians 3:2
and that we may be delivered from unreasonable and wicked men: for there is not faith in all.
Hebrews 11:6
But without faith it is impossible to be acceptable; for he must believe, who cometh unto God, that he exists, and is a rewarder of those who diligently seek him.