Sunan an Nasai
4132
Sahih+2

It was narrated that Jarir bin 'Abdullah said:"The Messenger of Allah [SAW] said to me: 'Ask the people to be quiet and listen.' Then he said: 'I do not want to see you after I am gone reverting to disbelievers, striking the necks of one another (killing one another)

SahihAbu Ghuddah
SahihAl-Albani