Matthew's Fulfilment Quotation

Matthew quotes an Old testament Prophet who predicted the virgin birth. The verses in Matthew's Gospel in which this is done are quoted below.

All this took place to fulfil what had been spoken by the Lord through the prophet:

 “Look, the virgin shall conceive and bear a son, and they shall name him Emmanuel,” which means, “God is with us.” (Mt 1:22-23)

Can you name the Old Testament prophet whom Matthew refers to and the Chapter and verse where that prophet writes this?

The Prophet is Isaiah and the text is Isa 7:14