I then found a corroborating narration for it. Aḥmad said, in the place previously cited: “Ḥasan narrated to us; Ibn Lahīʿah narrated to us; Abū ʿAshānah narrated to us,” with the same wording as ʿAmr ibn al-Ḥārith’s narration. Thus, in my view, the hadith is authentic, beyond any doubt. Praise be to Allah, by Whose blessing righteous deeds are brought to completion.

2560 — “Where have you gone?! It simply means: ‘O you who believe, those who stray—among the disbelievers—will not harm you if you are rightly guided.’”

Aḥmad recorded it (4/129 and 201–202) through ʿAlī ibn Mudrik, from Abū ʿĀmir al-Ashʿarī, who said: A man among them was killed at Awtās, so the Prophet, peace and blessings be upon him, said to him, “O Abū ʿĀmir, why did you not put a stop to it?” (1) He then recited this verse: “O you who believe, be responsible for yourselves. Those who go astray will not harm you if you are rightly guided.” [Quran 5:105] The Messenger of Allah, peace and blessings be upon him, became angry and said—and he then cited it.

Al-Ṭabarānī also narrated it, with the wording: From Abū ʿĀmir: Something occurred among them, and he stayed away from the Prophet, peace and blessings be upon him. The Prophet, peace and blessings be upon him, asked, “What kept you back?” He replied, “I recited this verse: ‘O you who believe, be responsible for yourselves. Those who go astray will not harm you if you are rightly guided.’” The Prophet, peace and blessings be upon him, said to him: “Those who stray among the disbelievers will not harm you if you are rightly guided.”

Al-Haythamī said in al-Majmaʿ (7/19): “The narrators of both chains are trustworthy, except that I have not found evidence that ʿAlī ibn Mudrik heard from any of the Companions.” I say: He overlooked the fact that Ibn Ḥibbān included him among the trustworthy Successors and said (3/180): “He heard Abū Masʿūd, a Companion of the Messenger of Allah, peace and blessings be upon him. Shuʿbah ibn al-Ḥajjāj narrated from him. He died in 120 AH.”