'Faithless' in the Bible

"Wicked and faithless generation!" He replied, "they clamour for a sign, but none shall be given to them except the sign of the Prophet Jonah.

A wicked and faithless generation are eager for a sign; but none shall be given to them except the sign of Jonah." and He left them and went away.

Then Jesus answered and said, O faithless and perverse generation, how long shall I be with you? how long shall I suffer you? bring him hither to me.