The Dothraki have two things
in abundance - GRASS and horses.
Game of Thrones Season 1, Episode 2
Well, then I guess bring a blanket.
The GRASS gets damp at night.
The Big Bang Theory Season 8, Episode 24
They only eat GRASS.
Game of Thrones Season 2, Episode 9
Khaleesi of the Great Grass Sea,
Game of Thrones Season 4, Episode 6
Grass is always greener?
The Big Bang Theory Season 8, Episode 18