Jareer reported,

The Prophet ﷺ said to him during the Farewell Pilgrimage, "Call the people to silence." Then he said, "Do not revert to disbelief after me, striking the necks of one another."

Azami 6813

Sahih

عن جرير

أن النبي ﷺ قال له في حجة الوداع: استنصت الناس فقال: لا ترجعوا بعدي كفارا، يضرب بعضكم رقاب بعض.

الأعظمي 6813صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Retaliation and crimes
Chapter
Prohibition of protected blood
Section
Killing a soul unjustly is among the greatest of major sins
Numbering
Jami al-Kamil 6813 (2nd edition)
Azami 6813