“Ṣaḥīḥ according to the criteria of al-Bukhārī.” Al-Dhahabī added, “According to the criteria of Muslim.”

I say: All of this calls for scrutiny. If this Isḥāq is Isḥāq ibn ʿAbd Allāh ibn al-Ḥārith, as al-Ḥākim understands, he is not among the narrators used by al-Bukhārī or Muslim; still, he is reliable and a number of scholars have narrated from him. If, however, he is Abū Isḥāq, the freedman of al-Ḥārith, then he is unknown, as al-Dhahabī himself states. And if the transmitter is simply named “Isḥāq” with no further identification, I do not know who he is.

Al-Haythamī states in al-Majmaʿ (10/80): “Aḥmad narrated it, and Abū Isḥāq, the freedman of ʿAbd Allāh ibn al-Ḥārith ibn Nawfal, has not been declared reliable by anyone, nor has anyone disparaged him; the remaining narrators in one of Aḥmad’s two chains are those of the Ṣaḥīḥ.”

The report has a corroborating chain from Ibn ʿAmr with the wording:

“No people sit in a gathering without remembering Allah except that they will see it as a regret on the Day of Resurrection.”

80 – “No people sit in a gathering without remembering Allah except that they will see it as a regret on the Day of Resurrection.”

(From Ibn ʿAmr):

It was recorded by Aḥmad (2/124) with a sound chain.

Al-Haythamī remarked: “Aḥmad transmitted it, and its narrators are those of the Ṣaḥīḥ.”

A second corroborating narration was recorded by al-Ṭayālisī (1756) from Jābir with a chain that meets the criteria of Muslim.