Matthew 16:1-4

And the Pharisees and Sadducees, coming near, tempting Him, asked Him to show them a sign from the heaven;

Mark 8:11-12

And the Pharisees came out, and began to discuss with Him, seeking from Him a sign from heaven, tempting Him.

Luke 11:29-30

And as the multitudes were gathering together to Him, He began to say, "This generation is an evil generation: it is seeking a sign, and a sign shall not be given it, except 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
And the Pharisees and Sadducees, coming near, tempting Him, asked Him to show them a sign from the heaven;
Mark 8:11
And the Pharisees came out, and began to discuss with Him, seeking from Him a sign from heaven, tempting Him.
Luke 11:29
And as the multitudes were gathering together to Him, He began to say, "This generation is an evil generation: it is seeking a sign, and a sign shall not be given it, except the sign of Jonah.