TSK · 2 Kings 20:8

He said to him, "If now I have found favor in your sight, then show me a sign that it is you who talk with me.

"'This shall be the sign to you: You shall eat this year that which grows of itself, and in the second year that which springs of the same; and in the third year sow, and reap, and plant vineyards, and eat its fruit.

"Ask a sign of Yahweh your God; ask it either in the depth, or in the height above."

Hezekiah also had said, "What is the sign that I will go up to the house of Yahweh?"