Abū Dāwūd alone records this report, and there is something unusual in both its chain and its wording. Allah knows best.

Imām Aḥmad (1) said: “Aḥmad b. al-Ḥajjāj narrated to us; ʿAbd Allāh narrated to us; al-Ḥajjāj b. Arṭāt narrated to us, from al-Ḥakam, from Abū al-Qāsim—meaning Miqsam—from Ibn ʿAbbās, who said:
‘The Messenger of Allah ﷺ stoned the Jamrah of al-ʿAqabah, then sacrificed, then shaved.’

Ibn Ḥazm claimed that the Prophet sacrificed cattle on behalf of his wives, sent a sacrificial offering (2) for them in the form of a cow, and that on that same day (3) he himself sacrificed two speckled rams.

Description of his noble shaving (4)—upon him the finest blessings and peace

Imām Aḥmad (5) said: “ʿAbd al-Razzāq narrated to us; Maʿmar narrated to us, from al-Zuhrī, from Sālim, from Ibn ʿUmar, that the Messenger of Allah ﷺ shaved during his Hajj.” Al-Nasāʾī (6) transmits it through Isḥāq b. Ibrāhīm—i.e. Ibn Rāhawayh—from ʿAbd al-Razzāq with the same chain.

Al-Bukhārī (7) said: “Abū al-Yamān narrated to us; Shuʿayb narrated to us,” who said: Nāfiʿ reported that ʿAbd Allāh b. ʿUmar used to say, “The Messenger of Allah ﷺ shaved during his Hajj.” Muslim (8) relates it through the narration of Mūsā b. ʿUqbah from Nāfiʿ.

Al-Bukhārī (9) also said: “ʿAbd Allāh b. Muḥammad b. Asmāʾ narrated to us; Juwairiyyah b. Asmāʾ narrated to us,” from Nāfiʿ that ʿAbd Allāh b. ʿUmar said: “The Messenger of Allah ﷺ shaved his head, a group of his Companions did likewise, and some merely shortened their hair.” Muslim (10) transmits it through al-Layth, from Nāfiʿ.

He added that ʿAbd Allāh said: The Messenger of Allah ﷺ (11) declared, “May Allah have mercy on those who shave (their heads) once—or twice.”
They said, “O Messenger of Allah (12), and those who shorten?” He replied, “And those who shorten.”

Muslim (13) also said: “Abū Bakr b. Abī Shaybah narrated to us; Wakīʿ and Abū Dāwūd al-Ṭayālisī [reported] from Shuʿbah, from Yaḥyā b…"