Isaiah 7:11

"Ask thee a sign of the LORD thy God; ask it either in the depth, or in the height above."

Cross References (ranked by relevance)

And this shall be a sign unto thee, Ye shall eat this year such as groweth of itself; and the second year that which springeth of the same: and in the third year sow ye, and reap, and plant vineyards, and eat the fruit thereof.

Isaiah 38:22

Hezekiah also had said, What is the sign that I shall go up to the house of the LORD?

2 Kings 19:29

And this shall be a sign unto thee, Ye shall eat this year such things as grow of themselves, and in the second year that which springeth of the same; and in the third year sow ye, and reap, and plant vineyards, and eat the fruits thereof.

Jeremiah 19:10

Then shalt thou break the bottle in the sight of the men that go with thee,

Jeremiah 19:1

Thus saith the LORD, Go and get a potter’s earthen bottle, and take of the ancients of the people, and of the ancients of the priests;