´It was narrated from Ibn 'Umar that :` The Prophet [SAW] said: "Do not revert to disbelievers after I am gone, striking the necks of one another (killing one another)."
Hadith ReferenceSunan an-Nasa'i / The Book Of Fighting (The Prohibition Of Bloodshed) / Hadith: 4130
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:متفق عليه