Matthew 11:16-17
"But to what shall I compare this generation? It is like children sitting in the marketplaces and calling to their companions,
Matthew 17:17
Then Jesus answered, "O faithless and perverse generation, how long shall I be with you? How long shall I bear with you? Bring him here to me."
Mark 9:19
He answered him, "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
"To what then shall I compare the men of this generation, and what are they like?
Luke 18:8
I tell you that he will bring about justice for them speedily. Nevertheless, when the Son of Man comes, will he find faith on the earth?"
2 Thessalonians 3:2
and that we may be delivered from wicked and evil men; for not all have faith.
Hebrews 11:6
And without faith it is impossible to please God, for anyone who comes to him must believe that he exists and that he rewards those who earnestly seek him.