On the authority of Abdullah, who said: I said, "O Messenger of Allah, which sin is greatest?" He said: "That you make for Allah a rival, while He created you." I said: "Then which?" He said: "That you kill your child for fear that he will eat with you." I said: "Then which?" He said: "That you commit adultery with your neighbor's wife." He said: And Allah the Exalted revealed, confirming the words of the Prophet, peace and blessings be upon him: {And those who do not invoke with Allah another deity, nor kill the soul which Allah has forbidden, except by right, nor commit unlawful sexual intercourse} [Al-Furqan: 68](1).

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(1) Its chain of transmission is authentic. Muhammad ibn Kathir: he is al-Abdi, and Sufyan: he is ibn Sa'id al-Thawri, and Mansur: he is ibn al-Mu'tamir al-Sulami, and Abu Wa'il: he is Shaqiq ibn Salama al-Asadi, and Amr ibn Shurahbil: he is Abu Maisara al-Hamdani al-Kufi.
It was also recorded by al-Bukhari (4477), (4761), (6001), (6811), and (7520), Muslim (86), al-Tirmidhi (3457), and al-Nasa'i in "al-Kubra" (7086), (10920), and (11305) via the path of Mansur, with this chain. The mention of the verse did not appear with some of them.
It was also recorded by al-Bukhari (6811), (6861), and (7532), Muslim (86), al-Tirmidhi (3457), and al-Nasa'i in "al-Kubra" (11305) via the path of al-A'mash Sulayman ibn Mihran, and al-Bukhari (6811), al-Tirmidhi (3456), and al-Nasa'i (3462) and (3463) via the path of Wasil al-Ahdab, and al-Nasa'i (3464) via the path of Asim ibn Bahdala, all three of them from Abu Wa'il, with it. Some of them also without the mention of the verse.
It is in "Musnad Ahmad" (4131), and "Sahih Ibn Hibban" (4414), (4415), and (4416). And see our complete discussion of it in "al-Musnad."
It was also recorded by al-Bukhari (4761) and (6811), al-Tirmidhi (3458) and (3459), and al-Nasa'i (7087) via the path of Wasil ibn Hayyan al-Ahdab, and al-Nasa'i (3464) via the path of Asim ibn Bahdala, and (11304) via the path of al-A'mash, all three of them from Abu Wa'il, from Abdullah ibn Mas'ud.
Without the mention of Amr ibn Shurahbil in the chain. And Amr al-Fallas mentioned, as in the narration of al-Bukhari (6811) from Abd al-Rahman ibn Mahdi, this narration of Wasil from which Amr ibn Shurahbil was omitted, and he said to him: "Leave it, leave it," we said: meaning he did not like it, and he rejected it. And al-Nasa'i declared erroneous the narration of Asim ibn —