Albert Barnes Commentary Matthew 12:42

"The queen of the south shall rise up in the judgment with this generation, and shall condemn it: for she came from the ends of the earth to hear the wisdom of Solomon; and behold, a greater than Solomon is here." — Matthew 12:42 (ASV)

The queen of the south. That is, the queen of Sheba, 1 Kings 10:1. Sheba was probably a city of Arabia, situated to the south of Judea. Compare with Barnes on Isaiah 60:6.

From the uttermost parts of the earth. This means simply from the most distant parts of the hospitable world then known. See a similar expression in Deuteronomy 28:49. As the knowledge of geography was limited, the place was in fact by no means in the extreme parts of the earth. It means that she came from a remote country; and she would condemn that generation, for she came a great distance to hear the wisdom of Solomon; and the Jews of that age would not listen to the wisdom of One much greater than Solomon, though present with them.