From Sahih Bukhari (Hadith 6545):
Narrated Abu Huraira:The Prophet (ﷺ) said, " It will be said to the people of Paradise, 'O people of Paradise! Eternity (for you) and no death,' and to the people of the Fire, 'O people of the Fire, eternity (for you) and no death
Reference: Bukhari 6545