TV series example of the word

Vikings Season 1, Episode 3
Thirteen.

Game of Thrones Season 2, Episode 7
I've demanded a meeting of the Thirteen. One of them did this or knows who did.

Game of Thrones Season 2, Episode 7
You are one of the Thirteen.

Game of Thrones Season 2, Episode 4
But we are the Thirteen,

Game of Thrones Season 2, Episode 4
The Thirteen have spoken.