Grading: Its chain is da'if (weak).
Technical note / Defect ('illah): The reason for the weakness is "'Ali bin Zayd" (Ibn Jud'an). He was contradicted by al-Mubarak bin Fadalah al-Basri, who narrated it from al-Hasan al-Basri as "mawquf" on al-'Abbas (may Allah be pleased with him). Al-Mubarak stated explicitly that he heard it from al-Hasan, in Ibn Qutaybah's "al-Ma'arif" (p. 35), and Ibn Nasir al-Din quoted this from him in "Jami' al-Athar" (2/16). So al-Mubarak's chain is "hasan", and the correct view is that it is "mawquf" on al-'Abbas.

Reference / Source: Ibn Abi Hatim narrated it in his "Tafsir" (as in "Tafsir Ibn Kathir" 7/28) from his father, from Muslim bin Ibrahim, from Hammad bin Salamah, with this same chain.

Reference / Source: Ibn Abi Hatim narrated it in his "Tafsir" (7/2186) from his father, from Abu Salamah Musa bin Isma'il, and al-Tha'labi in his "Tafsir" (8/151) via al-Hasan bin Musa al-Ashyab; both from Hammad bin Salamah, from 'Ali bin Zayd, from al-Hasan, from al-Ahnaf bin Qays, as "mursal".

Reference / Source: Al-Bazzar (1307), al-Tabari in his "Tarikh" (1/263), Abu Bakr al-Shafi'i in "al-Ghaylaniyyat" (307) and Ibn 'Asakir in "Tarikh Dimashq" (6/222) narrated it via Abu Kurayb Muhammad bin al-'Ala'; and al-Dulabi in "al-Kuna wa al-Asma'" (1053) from Mu'ammal bin Ihab; both from Zayd bin al-Hubab, from Abu Sa'id al-Hasan bin Dinar, from 'Ali bin Zayd, from al-Hasan al-Basri, from al-Ahnaf, from al-'Abbas, as "marfu'".

Reference / Source: Ibn 'Adi narrated it in "al-Kamil" (2/299) from 'Abdullah bin Zaydan, from al-Hasan bin Dinar, likewise.

Technical note / Defect ('illah): Apparently what is preserved (mahfuz) in the "marfu'", connected version is the mention of "al-Hasan bin Dinar", not Hammad bin Salamah. So the chain of the marfu' connected version contains two weak narrators: Ibn Jud'an and al-Hasan bin Dinar. As for the route of Hammad bin Salamah, what is preserved in it is "irsal" (i.e., it is mursal). Among those who pointed out that Hammad's narration is mursal are a group including Yahya bin Ma'in (in "Su'alat Ibn al-Junayd" 785), al-Bukhari (in his "Tarikh" 2/292), al-Bazzar and others.

Reference / Source: Yahya bin Sallam narrated it in his "Tafsir" (2/839), Ibn Qutaybah in "al-Ma'arif" (p. 35), al-Tabari in his "Tafsir" (23/81) and "Tarikh" (1/264), Abu Bakr al-Shafi'i in "al-Ghaylaniyyat" (306), al-Wahidi in "al-Tafsir al-Wasit" (3/529) and al-Dhahabi in "Siyar A'lam al-Nubala'" (2/98), through several routes from Mubarak bin Fadalah, from al-Hasan al-Basri, from al-Ahnaf bin Qays, from al-'Abbas, as "mawquf" on him (as his own statement).
Grading: Its chain is "hasan".