Isaiah 7:10-14 New Revised Standard Version (NRSV)
Isaiah Gives Ahaz the Sign of Immanuel
10 Again the Lord spoke to Ahaz, saying, 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 Then Isaiah said: “Hear then, O house of David! Is it too little for you to weary mortals, that you weary my God also? 14 Therefore the Lord himself will give you a sign. Look, the young woman is with child and shall bear a son, and shall name him Immanuel.