Matthew 16:1-4

Here the Pharisees and Sadducees came to Him; and, to make trial of Him, they asked Him to show them a sign in the sky.

Mark 8:11-12

The Pharisees followed Him and began to dispute with Him, asking Him for a sign in the sky, to make trial of Him.

Luke 11:29-30

Now when the crowds came thronging upon Him, He proceeded to say, "The present generation is a wicked generation: it requires some sign, but no sign shall be given to it except that 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
Here the Pharisees and Sadducees came to Him; and, to make trial of Him, they asked Him to show them a sign in the sky.
Mark 8:11
The Pharisees followed Him and began to dispute with Him, asking Him for a sign in the sky, to make trial of Him.
Luke 11:29
Now when the crowds came thronging upon Him, He proceeded to say, "The present generation is a wicked generation: it requires some sign, but no sign shall be given to it except that of Jonah.