1982 — We were told by ʿUbayd ibn Hishām — Abū Nuʿaym al-Ḥalabī — and ʿAmr ibn ʿUthmān — the meaning [being the same] — they said: We were told by Sufyān, from Hishām ibn Ḥassān, with his chain of transmission, to this effect. He said in it: He said to the barber: "Begin with the right side, and shave it."(1)

1983 — We were told by Naṣr ibn ʿAlī: Akhbaranā Yazīd ibn Zurayʿ: Akhbaranā Khālid, from ʿIkrimah
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= And it was also recorded by Muslim (1305), al-Tirmidhī (928), and al-Nasāʾī in al-Kubrā (4087) via the chain of Hishām, with this chain of transmission.
And al-Bukhārī recorded (171) via the chain of Ibn ʿAwn, from Muḥammad ibn Sīrīn, with it, with the wording: "When the Messenger of Allah, may Allah bless him and grant him peace, shaved his head, Abū Ṭalḥah was the first to take from his hair."
And it is in Musnad Aḥmad (12092), and Ṣaḥīḥ Ibn Ḥibbān (1371).
And see Musnad Aḥmad (12483).
And see what follows it.

Al-Khaṭṭābī said: In it is the Sunnah that one should begin in shaving with the right side of the head, then the left side — and this belongs to the category of what the Prophet, may Allah bless him and grant him peace, used to prefer of beginning with the right in everything, in his purification, his clothing, his sandals, and similar matters.

Al-dhabḥ (with the dhāl broken) is what is slaughtered of sheep, and al-dhabḥ is the act [of slaughtering].
And Abū Ṭalḥah: he is Zayd ibn Sahl ibn al-Aswad al-Anṣārī al-Khazrajī al-Najjārī, one of those present at ʿAqabah and Badr, a naqīb, well-known by his kunyah, and he is the husband of Umm Sulaym bint Milḥān, the mother of Anas ibn Mālik.

(1) Its chain of transmission is sound. ʿAmr ibn ʿUthmān: he is ibn Saʿīd al-Qurashī al-Ḥimṣī, and Sufyān: he is ibn ʿUyaynah.
And it was also recorded by Muslim (1305), al-Tirmidhī (928) and (929), and al-Nasāʾī in al-Kubrā (4102) via the chain of Sufyān, with this chain of transmission. And al-Tirmidhī said: A ḥasan ḥadīth.
And it is in Musnad Aḥmad (12092), and Ṣaḥīḥ Ibn Ḥibbān (3879).
And see what precedes it.

Note: We have established this ḥadīth from (H) alone — and it is according to the narration of Ibn Dāsah — and al-Mizzī mentioned in al-Tuḥfah (1456) that this ḥadīth is in the narration of Abū al-Ḥasan ibn al-ʿAbd and Abū Bakr ibn Dāsah.