Matthew 12:40

For as Jonah was three days and three nights in the belly of the great fish, so will the Son of man be three days and three nights in the heart of the earth.

Matthew 16:4

A wicked and adulterous generation seeketh after a sign; and no sign will be given to it, but the sign of Jonah. And he left them and went away.

Luke 11:30

For as Jonah was a sign to the Ninevites, so will also the Son of man be to this generation.

Treasury of Scripture Knowledge

Summary

Now the LORD had prepared a great fish to swallow up Jonah. And Jonah was in the belly of the fish three days and three nights.

General references

Bible References

In

Matthew 12:40
For as Jonah was three days and three nights in the belly of the great fish, so will the Son of man be three days and three nights in the heart of the earth.
Matthew 16:4
A wicked and adulterous generation seeketh after a sign; and no sign will be given to it, but the sign of Jonah. And he left them and went away.
Luke 11:30
For as Jonah was a sign to the Ninevites, so will also the Son of man be to this generation.

General references

Luke 11:30
For as Jonah was a sign to the Ninevites, so will also the Son of man be to this generation.