Isaiah 7:13-14. “And he said, Hear ye now, O house of David: Is it a small thing for you to weary men, but will ye weary my God also? Therefore the Lord Himself shall give you a sign: Behold, a virgin shall conceive, and bear a Son, and shall call His name Immanuel.”
Remember, God had offered King Ahaz, of the House of David, to ask for sign of some kind that He would fulfill His promise of a Redeemer through the lineage of David. Ahaz had refused, covering his lack of faith with an attempt to seem pious.
In what must have been complete irritation, Isaiah then told Ahaz what a chump he was, and said, “God will give a sign, and it will be amazing!” And then we get one of the most-quoted, beloved, and hopeful verses in all of the Old Testament.
A virgin shall conceive. Not just “a young woman,” as some translations would have it. No, a virgin. One who had never been with a man. One who could not possibly have been pregnant, because she was a virgin. This would be a miraculous conception.
She would bear a Son, and call Him Immanuel. The word Immanuel means God with us. This miraculously conceived child would be God in the flesh. He would be with us, here on the earth. He would walk with us, eat with us, teach us, do mighty acts among us. He would be, as we learn later, the Redeemer that God had first promised way back in Genesis 3:16.
So, did Ahaz fall on his face at this amazing prophecy? No. Apparently he was just as unmoved as so many are today at the idea that God would provide such a miracle, such a wonder, so great a salvation.