Isaiah 7:4-6, 14

and say to him, ‘Take care and be calm, have no fear and do not be fainthearted because of these two stubs of smoldering firebrands, on account of the fierce anger of Rezin and Aram and the son of Remaliah. Because Aram, with Ephraim and the son of Remaliah, has planned evil against you, saying, “Let us go up against Judah and terrorize it, and make for ourselves a breach in its walls and set up the son of Tabeel as king in the midst of it,”

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.