Then Mary said to the angel, “How can this be, since I do not know a man?” And the angel answered and said to her, “The Holy Spirit will come upon you, and the power of the Highest will overshadow you; therefore, also, that Holy One who is to be born will be called the Son of God.” Luke 1:34-35

“You are My witnesses,” says the Lord, “And My servant whom I have chosen, that you may know and believe Me, and understand that I am He. Before Me there was no God formed, nor shall there be after Me.” Isaiah 43:10