The Prophet ﷺ said, "The angels curse any one of you who points a weapon at his brother, even if he is his brother through both his father and his mother."Ubayy said, Ibn Abu Adi did not raise it to the Prophet.
حدثنا يزيد أخبرنا ابن عون عن محمد
عن النبي ﷺ قال الملائكة تلعن أحدكم إذا أشار لأخيه بحديدة وإن كان أخاه لأبيه وأمه قال أبي ولم يرفعه ابن أبي عدي
Its isnad is sahih. Muhammad is Ibn Sirin. The hadith was narrated by Muslim, 2:291, through Yazid bin Harun - the teacher of Ahmad here - with this same isnad. He did not quote its wording, but instead said, "similarly," referring back to the narration before it through Sufyan bin Uyayna from Ayub from Ibn Sirin, who said, I heard Abu Hurairah say, Abu Qasim said, "Whoever points a blade at his brother, the angels curse him, even if it is his full brother by both father and mother."Tirmidhi also narrated it, 3:206, in abbreviated form, through Khalid Haddan from Muhammad bin Sirin from Abu Hurairah, as a raised narration, then said, this is a hasan sahih hadith, rare in this particular form, considered rare when coming through Khalid Haddan. Ayub also narrated it from Muhammad bin Sirin from Abu Hurairah in similar fashion, but did not raise it to the Prophet, and added in it, "even if it is his brother by both father and mother," then he traced his isnad to Hammad bin Zayd from Ayub.However, Muslim's narration, through Ibn Uyayna from Ayub, shows that Ayub narrated it both as a raised narration and as a stopped one. Imam Ahmad indicated, right after this hadith, that Ibn Abu Adi also did not raise it to the Prophet, meaning that he narrated it from Ibn Awn from Ibn Sirin from Abu Hurairah as a stopped narration.This is not a defect, nor is what Tirmidhi said valid, for raising a narration to the Prophet is an addition coming from trustworthy narrators, and such an addition is acceptable and sahih. Moreover, something of this nature is not the kind of thing said merely as personal opinion, so the ruling for its stopped form is that it carries the meaning of a raised one.Abu Naeem also narrated it in al-Hilyah, 6:134, through Muhammad bin Amr from Abu Salama from Abu Hurairah, as a raised narration, with the same wording found here, except that in his version it begins, "The angels curse..."So the hadith is sahih, with no defect in it. It will come again with this same isnad and wording at number 10565.