II.20. (19.) Married people.
(5) That married people are blessed by a priest in this coming together, is explained by the fact that his was done by God in the first condition of men. For thus it is written: "So God created humankind in his image, in the image of God he created them; male and female he created them. God blessed them, and God said to them, "Be fruitful and multiply" [Gen 1:27-28]. Therefore in this likeness there is done now in the church what was done in paradise. [...]
(trans. Knoebel 2008: 99)