Isaiah 7:10-16

Then the LORD spoke again to [King] Ahaz, saying, “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.” But Ahaz said, “I will not ask, nor will I test the LORD!” Then 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? Therefore 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). [Is 9:6; Jer 31:22; Mic 5:3-5; Matt 1:22, 23] He will eat curds and honey when he knows enough to refuse evil and choose good. For before the child will know enough to refuse evil and choose good, the land (Canaan) whose two kings you dread will be deserted [both Ephraim and Aram]. [Is 7:2]