Matthew 16:1-4

The Pharisees and Sadducees came up and to test him asked him to show them a sign from heaven.

Mark 8:11-12

The Pharisees came out and began a discussion with him, testing him by asking him to show them a sign from heaven.

Luke 11:29-30

As the crowds pressed a round him, he went on to say, "This is a wicked age! It demands a sign, and no sign will be given it but the sign of Jonah.

Treasury of Scripture Knowledge

Summary

And Isaiah said, This sign shalt thou have of the LORD, that the LORD will do the thing that he hath spoken: shall the shadow go forward ten degrees, or go back ten degrees?

Bible References

This sign

Matthew 16:1
The Pharisees and Sadducees came up and to test him asked him to show them a sign from heaven.
Mark 8:11
The Pharisees came out and began a discussion with him, testing him by asking him to show them a sign from heaven.
Luke 11:29
As the crowds pressed a round him, he went on to say, "This is a wicked age! It demands a sign, and no sign will be given it but the sign of Jonah.