´It was narrated from Ibn ‘Umar that the Messenger of Allah (ﷺ) said:` “Woe to you! Do not turn back into disbelievers after I am gone, striking one another’s necks.”
Hadith Referenceسنن ابن ماجه / كتاب الفتن / 3943
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:متفق عليه