Ketubot 7 - Blessing at the wedding

A marriage is a mitzvah which requires the following blessing to be said: Blessed are You, God our Lord, King of the universe, who sanctified us with His commandments and commanded us regarding not violating forbidden unions; Who forbade us to even stay alone with our bride before we are married, and Who permitted us those women who are married to us - but through proper chuppah, which is preceded by engagement.

And then it concludes, just like a Kiddush - Blessed are You, God, Who sanctified Israel with chuppah and engagement.

Art: The Engagement Ring by John Shirley Fox