Matthew 1:18-25 Matt. 1:18   Now the birth of Jesus Christ was on this wise: When as his mother Mary was espoused to Joseph, before they came together, she was found with child of the Holy Ghost. 19 Then Joseph her husband, being a just man, and not willing to make her a publick example, was minded to put her away privily. 20 But while he thought on these things, behold, the angel of the Lord appeared unto him in a dream, saying, Joseph, thou son of David, fear not to take unto thee Mary thy wife: for that which is conceived in her is of the Holy Ghost. 21 And she shall bring forth a son, and thou shalt call his name JESUS: for he shall save his people from their sins. 22 Now all this was done, that it might be fulfilled which was spoken of the Lord by the prophet, saying, 23 Behold, a virgin shall be with child, and shall bring forth a son, and they shall call his name Emmanuel, which being interpreted is, God with us. 24 Then Joseph being raised from sleep did as the angel of the Lord had bidden him, and took unto him his wife: 25 And knew her not till she had brought forth her firstborn son: and he called his name JESUS. 

 Is. 7:10-16   Moreover the LORD spake again unto Ahaz, saying, 11 Ask thee a sign of the LORD thy God; ask it either in the depth, or in the height above. 12 But Ahaz said, I will not ask, neither will I tempt the LORD. 13 And he said, Hear ye now, O house of David; Is it a small thing for you to weary men, but will ye weary my God also? 14 Therefore the Lord himself shall give you a sign; Behold, a virgin shall conceive, and bear a son, and shall call his name Immanuel. 15 Butter and honey shall he eat, that he may know to refuse the evil, and choose the good. 16 For before the child shall know to refuse the evil, and choose the good, the land that thou abhorrest shall be forsaken of both her kings.

Rom. 1:1-7   Paul, a servant of Jesus Christ, called to be an apostle, separated unto the gospel of God, 2 (Which he had promised afore by his prophets in the holy scriptures,) 3 Concerning his Son Jesus Christ our Lord, which was made of the seed of David according to the flesh; 4 And declared to be the Son of God with power, according to the spirit of holiness, by the resurrection from the dead: 5 By whom we have received grace and apostleship, for obedience to the faith among all nations, for his name: 6 Among whom are ye also the called of Jesus Christ: 7 To all that be in Rome, beloved of God, called to be saints: Grace to you and peace from God our Father, and the Lord Jesus Christ.