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.
Now as the sign of Jonas is a type of our Lord’s passion, so also is it a testimony of the grievous sins which the Jews have committed. We may remark at once both the mighty voice of warning, and the declaration of mercy. For by the example of the Ninevites both a punishment is denounced, and a remedy promised. Hence even the Jews ought not to despair of pardon, if they will but practise repentance.