The Sign of Immanuel (The Messiah would be born of a virgin)

Isaiah 7:10) Again the Lord spoke to Ahaz, 11) "Ask a sign of the Lord your God; let it be deep as Sheol or high as heaven." 12) But Ahaz said, "I will not ask, and I will not put the Lord to the test." 13) And he said, "Hear then, O house of David! Is it too little for you to weary men, that you weary my God also? 14) Therefore the Lord himself will give you a sign. Behold, the virgin shall conceive and bear a son, and shall call his name Immanuel. 15) He shall eat curds and honey when he knows how to refuse the evil and choose the good. 16) For before the boy knows how to refuse the evil and choose the good, the land whose two kings you dread will be deserted. 17) 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."
18) In that day the Lord will whistle for the fly that is at the end of the streams of Egypt, and for the bee that is in the land of Assyria. 19) And they will all come and settle in the steep ravines, and in the clefts of the rocks, and on all the thornbushes, and on all the pastures.
20) In that day the Lord will shave with a razor that is hired beyond the River—with the king of Assyria—the head and the hair of the feet, and it will sweep away the beard also.
21) In that day a man will keep alive a young cow and two sheep, 22) and because of the abundance of milk that they give, he will eat curds, for everyone who is left in the land will eat curds and honey.
23) In that day every place where there used to be a thousand vines, worth a thousand shekels of silver, will become briers and thorns. 24) With bow and arrows a man will come there, for all the land will be briers and thorns. 25) And as for all the hills that used to be hoed with a hoe, you will not come there for fear of briers and thorns, but they will become a place where cattle are let loose and where sheep tread.