Game of Thrones Season 6 Episode 05 The Door
Daenerys emotionally orders Jorah to find a cure to his greyscale and return to her so that he can be by her side when she conquers Westeros.
DAENERYS: Do not walk away from your queen, Jorah the Andal. You have not been dismissed. You pledged yourself to me. You swore to obey my commands for the rest of your life. Well, I command you to find the cure wherever it is in this world. I command you to heal yourself and then return to me. When I take the Seven Kingdoms, I need you by my side.
Source text: Wikipedia.