Again the LORD spoke to Ahaz: “Ask a sign of the LORD your God; let it be deep as Sheol or high as heaven.” But Ahaz said, “I will not ask, and I will not put the LORD to the test.” And he said, “Hear then, O house of David! Is it too little for you to weary men, that you weary my God also? Therefore the Lord himself will give you a sign. Behold, the virgin shall conceive and bear a son, and shall call his name Immanuel. He shall eat curds and honey when he knows how to refuse the evil and choose the good. For before the boy knows how to refuse the evil and choose the good, the land whose two kings you dread will be deserted. The LORD will bring upon you and upon your people and upon your father’s house such days as have not come since the day that Ephraim departed from Judah--the king of Assyria!”
Note: Isaiah 7 is a reading both for the Fourth Sunday in Advent and for Christmas Eve. Since my congregation did not get to hear Sunday's sermon due to weather, and since I've been doing a series on the Isaiah texts, I reworked that sermon for Christmas Eve.