In Matthew 12, Jesus makes a prophecy concerning his own burial.
Then some of the scribes and Pharisees said to Him, “Teacher, we want to see a sign from You.” But He answered and said to them, “An evil and adulterous generation craves for asign; and yet nosign will be given to it but the sign of Jonah the prophet; for just as JONAH WAS THREE DAYS AND THREE NIGHTS IN THE BELLY OF THE SEA MONSTER, so will the Son of Man be three days and three nights in the heart of the earth.
This same story also appears in Luke 11 in more general terms, and there’s a further reference to the Sign of Jonah in Matthew 16, but Matthew 12 is unique in specifying exactly three days and three nights. And it’s a problem, because according to the Gospels, this prophecy got the duration wrong.