ī li-l-Fatāwī, where he also ascribed it to Ẓāhir ibn Ṭāhir in his Kitāb Tuhfat ʿĪd al-Fiṭr and to Abū Aḥmad al-Farāḍī.
Al-Muḥāmilī likewise recorded it in Kitāb Ṣalāt al-ʿĪdayn, 2/129/2, with a chain whose transmitters are all trustworthy—men found in the Tahdhīb—save his own teacher al-Muhannā ibn Yaḥyā. Yet al-Dāraquṭnī declared him reliable and distinguished, and he is given a biography in Tārīkh Baghdād 13/266–268. Accordingly the isnād is ṣaḥīḥ. Ḥājib ibn al-Walīd, however, reported the tradition along a different chain and did not raise it to the level of the Prophet’s Companions. He said:
“Mubashshir ibn Ismāʿīl al-Ḥalabī narrated to us from Ṣafwān ibn ʿAmr al-Saksakī, who said: ‘I heard ʿAbd Allah ibn Busr, ʿAbd al-Raḥmān ibn ʿĀʾidh, Jubayr ibn Nufayr, and Khālid ibn Maʿdān being greeted on the days of Eid with the words, ‘May Allah accept from us and from you,’ and they themselves would say the same to others.’”
Abū l-Qāsim al-Iṣfahānī brought it in his work al-Targhīb wa-l-Tarhīb, folios 41/2–42/1.
If the chain to al-Ḥājib proves sound, there still remains a transmitter on the route to him whose status needs investigation. It may be that Mubashshir ibn Ismāʿīl related both versions. Moreover, this ʿAbd Allah ibn Busr—the Māzinī—was a young Companion whose father also enjoyed Companionship, making it unlikely that he and the Successors named with him would have said anything without first receiving it from senior Companions. In that case, both reports are authentic: the Companions practised the greeting, and the cited Successors followed their example. Allah knows best.
The first narration is further corroborated by what Ibn al-Turkmanī cited in al-Jawhar al-Naqī 3/320, through a report of Muḥammad ibn Ziyād, who said: “I was with Abū Umāmah al-Bāhilī and others from the Companions of the Prophet—peace and blessings be upon him—when they would return…"