700 years before the birth of Jesus Christ, the prophecy came to Prophet Isaiah
Isa 7:14 Therefore the Lord himself will give you a sign. Behold, the virgin shall conceive and bear a son, and shall call his name Immanuel.
Luk 1:26 In the sixth month the angel Gabriel was sent from God to a city of Galilee named Nazareth,
Luk 1:27 to a virgin betrothed to a man whose name was Joseph, of the house of David. And the virgin’s name was Mary.
Luk 1:28 And he came to her and said, “Greetings, O favored one, the Lord is with you!”
Luk 1:29 But she was greatly troubled at the saying, and tried to discern what sort of greeting this might be.
Luk 1:30 And the angel said to her, “Do not be afraid, Mary, for you have found favor with God.
Luk 1:31 And behold, you will conceive in your womb and bear a son, and you shall call his name Jesus.
Luk 1:32 He will be great and will be called the Son of the Most High. And the Lord God will give to him the throne of his father David,
Luk 1:33 and he will reign over the house of Jacob forever, and of his kingdom there will be no end.”
Luk 1:34 And Mary said to the angel, “How will this be, since I am a virgin?”
Luk 1:35 And the angel answered her, “The Holy Spirit will come upon you, and the power of the Most High will overshadow you; therefore the child to be born will be called holy–the Son of God.
Luk 1:36 And behold, your relative Elizabeth in her old age has also conceived a son, and this is the sixth month with her who was called barren.
Luk 1:37 For nothing will be impossible with God.”