Valar Dohaeris
All Men Must Serve
Serving one’s purpose or destiny. “It probably comes down to something around the lines of ‘do what needs to be done within the time you are alloted’.”
This phrase is often a response to “Valar Morghulis” and is significant to the Faceless Men. “It’s kind of a call-and-response, part greeting, part password.”
The service can be to the Many-Faced God. “All men must serve (depends on context, but mostly means serving god/gods).”