The Messenger of Allah ﷺ came out to us and said, "Do you suppose that I will be the last of you to die? I will be among the first of you to die, and you will follow me in scattered groups, destroying one another."
حدثنا أبو المغيرة قال سمعت الأوزاعي قال حدثني ربيعة بن يزيد قال سمعت
خرج علينا رسول الله ﷺ فقال أتزعمون أني آخركم وفاة ألا إني من أولكم وفاة وتتبعوني أفنادا يهلك بعضكم بعضا
Its isnad is sahih, its narrators are trustworthy and well-known and have already been mentioned. The hadith was narrated by Tabarani in Al-Kabir 22/69, no. 168. Haythami said in 7/306, "The narrators of Ahmad are the narrators of the Sahih."