For as Jonah was three days and three nights in the belly of the great fish; so shall the Son of man be three days and three nights in the heart of the earth.
All Commentaries on Matthew 12:40 Go To Matthew 12
Augustine of Hippo
AD 430
The Savior pointed out that Jonah the prophet, who having been tossed into the sea was caught in the belly of the whale and emerged on the third day, prefigured the Son of Man who would suffer and rise on the third day. The Jewish people were censured in comparison with the Ninevites, for the Ninevites, to whom Jonah the prophet had been sent by way of reproof, placated God’s wrath by repenting and gained his mercy. “And behold,” he said, “something greater than Jonah is here,” the Lord Jesus implying himself. The Ninevites heard the servant and amended their ways; the Jews heard the Lord and not only did they not amend their ways but moreover they killed him. ..