Ambrose of Milan
Catena Aurea · Lukasevangelium 11
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. For as Jonas was a sign unto the Ninevites, so shall also the Son of man be to this generation. The queen of the south shall rise up in the judgment with the men of this generation, and condemn them; for she came from the utmost parts of the earth to hear the wisdom of Solomon; and, behold, a greater than Solomon is here. The men of Nineve shall rise up in the judgment with this generation, and shall condemn it: for they repented at the preaching of Jonas; and, behold, a greater than Jonas is here.
That you may know that the people of the Synagogue are treated with dishonour, while the blessedness of the Church is increased. But as Jonas was a sign to the Ninevites, so also will the Son of man be to the Jews. Hence it is added, They seek a sign; and there shall no sign be given them but the sign of Jonas the prophet.