Matthew 16:1-4

Then the Pharisees and Sadducees came to him, and in order to test him, asked him to show them a sign from heaven.

Mark 8:11-12

And the Pharisees came out and began to question him, seeking from him a sign from heaven, by way of testing him.

Luke 11:29-30

When the crowd were beginning to throng about him he proceeded to say. "This is an evil generation! It seeks a sign, and there shall be no sign be given to 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
Then the Pharisees and Sadducees came to him, and in order to test him, asked him to show them a sign from heaven.
Mark 8:11
And the Pharisees came out and began to question him, seeking from him a sign from heaven, by way of testing him.
Luke 11:29
When the crowd were beginning to throng about him he proceeded to say. "This is an evil generation! It seeks a sign, and there shall be no sign be given to it except the sign of Jonah;