Isaiah 7:10-14

10Then the Lord spoke again to [King] Ahaz, saying,

11“Ask a sign for yourself from the Lord your God [one that will convince you that God has spoken and will keep His word]; make your request as deep as Sheol or as high as heaven.”

12But Ahaz said, “I will not ask, nor will I test the Lord!”

13Then Isaiah said, “Hear then, O house of David! Is it too small a thing for you to try the patience of men, but will you try the patience of my God as well?

14Therefore the Lord Himself will give you a sign: Listen carefully, the virgin will conceive and give birth to a son, and she will call his name Immanuel (God with us).