Matthew 11:16-17
"To what shall I compare this generation? It is like little children sitting in the market-place, who call to the other children,
Matthew 17:17
In reply Jesus said: "O faithless and perverse generation, how long shall I be with you? How long shall I endure you? Bring him here to me!"
Mark 9:19
"O unbelieving generation!" replied Jesus; "how long must I be with you? How long must I be patient with you? Bring him to me."
Luke 7:31-32
"To what then shall I compare the men of this generation?
Luke 18:8
"I tell you that he will quickly see justice done to his elect! Nevertheless, when the Son of man comes, will he find faith upon the earth?"
2 Thessalonians 3:2
and that I may be delivered from unreasonable and wicked men; for all do not hold the faith.
Hebrews 11:6
now without faith it is impossible to please him; for he who comes to God must believe that he is, and that he ever rewards those who are seeking.