Pride, Gluttony and Scars「傲慢と暴食と傷跡 Gōman to Bōshoku to Kizuato」 is the 333rd chapter of the manga, Nanatsu no Taizai.
Zeldris and Gelda head out on their own with the others seeing them off but Escanor gets his friend's attention, revealing he can no longer move. He gives his passing words to the other members of the Seven Deadly Sins and receives a surprise kiss from Merlin before passing on.
Q373. P-san (From Nagasaki Prefecture): How Merlin's real name pronunciation sounds?
Nakaba: Hmmm.... Sounds like talking underwater?