Matthew 16:4
A wicked and adulterous generation seeks after a sign; and there shall no sign be given to it, but the sign of the prophet Jonas. And he left them, and departed.
Nave's Topical Index—AKJV

Luke 11:29,30
And when the people were gathered thick together, he began to say, This is an evil generation: they seek a sign; and there shall no sign be given it, but the sign of Jonas the prophet.
Nave's Topical Index—AKJV