Grading: This athar (report) is "sahih", and its chain is "hasan" on account of Ahmad bin Abd al-Jabbar.
Technical note / Defect ('illah): The other narrators of the chain include Abu Mu'awiyah (Muhammad bin Khazim), al-A'mash (Sulayman bin Mihran) and Abu Nadrah (al-Mundhir bin Malik).

Reference / Source: Imam al-Darimi narrated it in his "Sunan" (620) via Abu Ma'mar, from Abu Mu'awiyah (Muhammad bin Khazim al-Darir), with this same chain.

Reference / Source: The following imams transmitted this narration via various routes from al-A'mash (Sulayman bin Mihran): Ibn Abi Shaybah (8/ 733), al-Ramahurmuzi in "al-Muhaddith al-Fasil" (723), the author (al-Hakim) in "Ma'rifat Ulum al-Hadith" (p. 140), al-Bayhaqi in "al-Madkhal" (422), al-Khatib al-Baghdadi in "al-Jami'" (1819), and Ibn Abd al-Barr in "Bayan al-'Ilm" (626 and 706).
Corroborating chains and supporting reports: Also, Imam Ahmad narrated it in "al-'Ilal" (20) and al-Darimi in (618 and 619) via two routes from Ja'far bin Iyas.

Reference / Source: It was transmitted by Imam al-Darimi (617), al-Harith bin Abi Usamah (Bughyat al-Bahith: 49), al-Ramahurmuzi (722), al-Tabarani in "al-Awsat" (2477) and al-Bayhaqi (725), via two routes from Abu Nadrah (al-Mundhir bin Malik).
Note / Clarification: This narration will come again later at number (6532).

Note / Clarification: The wording is thus in manuscripts (Z) and (S), while in manuscript (B) and the printed edition the words are "ala mudhakarah" (on the basis of discussion/review).