The Messenger of Allah ﷺ said, "The people of Paradise will enter Paradise."Ubayy said, Saad narrated it to us with the wording, "Allah will admit the people of Paradise into Paradise and the people of the Fire into the Fire. Then a caller will rise between them and announce, 'People of Paradise, there is no more death. People of the Fire, there is no more death. Each of you will remain forever in the state you are in.'"
حدثنا يعقوب حدثنا أبي عن صالح حدثنا نافع أن
إن رسول الله ﷺ قال يدخل أهل الجنة الجنة قال أبي وحدثناه سعد قال يدخل الله أهل الجنة الجنة وأهل النار النار ثم يقوم مؤذن بينهم فيقول يا أهل الجنة لا موت ويا أهل النار لا موت كل خالد فيما هو فيه
Its isnad is sahih. Bukhari related it (11:360), and Muslim (2:354), both by way of Yaqub bin Ibrahim bin Saad, from his father, from Salih bin Kaysan, with this same isnad, in a similar manner. Something like its meaning has already passed by way of the narration of Umar bin Muhammad bin Zayd, from his father, from Ibn Umar (5993, 6022, 6023).