David expresses the need to be silent before God and praise Him. He then says, “And to You the vow will be performed.”

A vow indicates one who enters an agreement, which they are committed to fulfill. 

Performed indicates that when the vow is paid it completes the agreement so that both parties are in a state of peace (Theological Wordbook of the OT).

A leaders first responsibility is to God first and then to those they lead. They must be committed to fulfill the responsibility to which they have entered as leaders.

When they do, both parties enjoy a state of peace.