Isaiah 7:13-14 (NASB):

Then he said, “Listen now, O house of David! Is it too slight a thing for you to try the patience of men, that you will try the patience of my God as well? Therefore the Lord Himself will give you a sign: Behold, a virgin will be with child and bear a son, and she will call His name Immanuel.

Isaiah 9:6-7 (NASB)

For a child will be born to us, a son will be given to us;
And the government will rest on His shoulders;
And His name will be called Wonderful Counselor, Mighty God,
Eternal Father, Prince of Peace.
There will be no end to the increase of His government or of peace,