2 Kings 20:9
And Isaiah said, This sign shalt thou have of the LORD, that the LORD will do the thing that he has spoken: shall the shadow go forward ten degrees or go back ten degrees?
Isaiah 38:7-8
And this shall be a sign unto thee from the LORD that the LORD will do this thing that he has spoken:
Matthew 16:1-4
The Pharisees and the Sadducees came to tempt him; they asked him to show them a sign from the heaven.
Mark 8:11-12
And the Pharisees came forth and began to argue with him, demanding of him a sign from heaven, tempting him.
Luke 11:29-30
And gathering the people unto him, he began to say, This is an evil generation: they seek a sign, and no sign shall be given it but the sign of Jonah the prophet.