2 Kings 20:8–9
8 And Hezekiah said to Isaiah, “What shall be the sign that the Lord will heal me, and that I shall go up to the house of the Lord on the third day?” 9 And Isaiah said, “This shall be ithe sign to you from the Lord, that the Lord will do the thing that he has promised: shall the shadow go forward ten steps, or go back ten steps?”
1 Samuel 2:34
34 aAnd this that shall come upon your two sons, Hophni and Phinehas, shall be the sign to you: both of them shall die bon the same day.
Isaiah 7:11
11 “Ask aa sign of the Lord your1 God; let it be deep as Sheol or high as heaven.”
Isaiah 7:14
14 Therefore the cLord himself will give you a sign. dBehold, the evirgin shall conceive and bear a son, and shall call his name fImmanuel.1