An angel appears to Joseph
An angel appeared to Joseph, encouraged him to marry Mary, and foretold the birth of Jesus.
Key passages
Mt 1:18–24

Now the birth of Jesus Christ occurred in this way. His mother Mary had been betrothed to Joseph, but before they came together, she was found to be pregnant by the Holy Spirit. So Joseph her husband, being righteous and not wanting to disgrace her, intended to divorce …

See also