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 in a mystery, the Church consists of two things, either ignorance of sin, which has reference mainly to the queen of the South, or ceasing to sin, which relates indeed to the repentant Ninevites. For repentance blots out the offence, wisdom guards against it.