Matthew 12:40

For, just as 'Jonah was inside the sea-monster three days and three nights,' so shall the Son of Man be three days and three nights in the heart of the earth.

Matthew 16:21

At that time Jesus Christ began to explain to his disciples that he must go to Jerusalem, and undergo much suffering at the hands of the Councillors, and Chief Priests, and Teachers of the Law, and be put to death, and rise on the third day.

Treasury of Scripture Knowledge

Summary

And it came to pass in the third year, that Jehoshaphat the king of Judah came down to the king of Israel.

Bible References

In the third

Matthew 12:40
For, just as 'Jonah was inside the sea-monster three days and three nights,' so shall the Son of Man be three days and three nights in the heart of the earth.
Matthew 16:21
At that time Jesus Christ began to explain to his disciples that he must go to Jerusalem, and undergo much suffering at the hands of the Councillors, and Chief Priests, and Teachers of the Law, and be put to death, and rise on the third day.