2 Kings 20:9

And Isaiah said, This shall be the sign to thee from LORD, that LORD will do the thing that he has spoken: Shall the shadow go forward ten steps, or go back ten steps?

Isaiah 38:7-8

And this shall be the sign to thee from LORD, that LORD will do this thing that he has spoken:

Matthew 16:1-4

And the Pharisees and Sadducees who came, testing, demanded him to exhibit to them a sign from the sky.

Mark 8:11-12

And the Pharisees came forth, and began to dispute with him, seeking from him a sign from the sky, testing him.

Luke 11:29-30

And when the multitudes gathered together he began to say, This generation is evil. They seek a sign, and no sign will be given to it except the sign of Jonah, the prophet.

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

Isaiah 38:7
And this shall be the sign to thee from LORD, that LORD will do this thing that he has spoken:
Matthew 16:1
And the Pharisees and Sadducees who came, testing, demanded him to exhibit to them a sign from the sky.
Mark 8:11
And the Pharisees came forth, and began to dispute with him, seeking from him a sign from the sky, testing him.
Luke 11:29
And when the multitudes gathered together he began to say, This generation is evil. They seek a sign, and no sign will be given to it except the sign of Jonah, the prophet.