The Catechism in Questions & Answers

679. How is the divine service concluded?

At the end of the divine service, all those who are present receive the blessing of the triune God. Together with the Trinitarian opening formula, the concluding benediction forms the framework that embraces the divine service event. This makes it clear that everything which occurs in the divine service emanates from the triune God.

Trinitarian: see explanation of Question 490.