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 Jonah the prophet.
All Commentaries on Luke 11:29 Go To Luke 11
Cyril of Alexandria
AD 444
He will not grant you another sign, so that he may give holy things to dogs or throw pearls before swine….He said only the sign of Jonah will be given to them. This means the passion on the cross and the resurrection from the dead. Commentary on Luke, Homily