From Sahih Bukhari (Hadith 6544):
Narrated Ibn `Umar:The Prophet; said, "The people of Paradise will enter Paradise, and the people of the (Hell) Fire will enter the (Hell) Fire: then a call-maker will get up (and make an announcement) among them, 'O the people of the (Hell) Fire! No death anymore ! And O people of Paradise! No death (anymore) but Eternity
Reference: Bukhari 6544