Hadith 697
Jarir bin 'Abdullah (May Allah be pleased with him) reported:
عن جرير بن عبد الله رضي الله عنه قال: قال لي رسول الله صلى الله عليه وسلم في حجة الوداع: "استنصت الناس" ثم قال: لا ترجعوا بعدي كفاراً يضرب بعضكم رقاب بعض" ((متفق عليه)) .
Messenger of Allah (ﷺ) asked me on the occasion of the Farewell Pilgrimage to tell the people to keep silent, then he (ﷺ) said, "Do not revert to disbelief after me, chopping the heads of one another." [Al-Bukhari and Muslim].
In plain words
At the Farewell Pilgrimage the Prophet had the people quieted, then warned them not to fall back into disbelief after him by turning violently against one another. Unity and avoiding bloodshed were a parting concern.
Reference : Riyad as-Salihin 697 In-book reference : Book 1, Hadith 18