Matthew 1:18-20

18Now the birth of Jesus Christ was thus: His mother, Mary, that is, having been betrothed to Joseph, before they came together, she was found to be with child of [the] Holy Spirit.

19But Joseph, her husband, being [a] righteous [man], and unwilling to expose her publicly, purposed to have put her away secretly;

20but while he pondered on these things, behold, an angel of [the] Lord appeared to him in a dream, saying, Joseph, son of David, fear not to take to [thee] Mary, thy wife, for that which is begotten in her is of [the] Holy Spirit.