Narrated Nuaym ibn Masud: I heard the Messenger of Allah ﷺ say when he read the letter of Musaylimah: What do you believe yourselves? They said: We believe as he believes. He said: I swear by Allah that were it not that messengers are not killed, I would cut off your heads.
Hadith Referenceسنن ابي داود / كتاب الجهاد / 2761
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:إسناده حسن, مشكوة المصابيح (3982)
Hadith Takhrij« تفرد بہ أبوداود، (تحفة الأشراف: 11650)، وقد أخرجہ: مسند احمد (3/487) (صحیح) »