3294 - Makhlad ibn Khalid narrated to us, 'Abd al-Razzaq narrated to us, Ibn Jurayj narrated to us, who said: Yahya ibn Sa'id wrote to me, saying:
'Ubayd Allah ibn Zahr, a freed slave of Banu Damra — and he was a man of good character — informed me that Abu Sa'id al-Ru'ayni informed him, with the chain of Yahya and its meaning(1).

3295 - Hajjaj ibn Abi Ya'qub narrated to us, Abu al-Nadr narrated to us, Sharik narrated to us, from Muhammad ibn 'Abd al-Rahman, freed slave of the family of Talha, from Kurayb,
from Ibn 'Abbas, who said: A man came to the Prophet, peace and blessings be upon him, and said: "O Messenger of Allah, my sister made a vow — meaning that she would perform the Hajj walking." The Prophet, peace and blessings be upon him, said: "Indeed, Allah has no need of your sister's hardship. Let her perform the Hajj riding, and let her expiate for her vow(2)."

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= The sound report from 'Uqbah ibn 'Amir concerning the expiation of a vow is what Muslim transmitted (1645), and it will come from the author at numbers (3323) and (3324), with the wording: "The expiation of a vow is the expiation of an oath." It was stated in this hadith in absolute terms without restricting it to fasting. Its restriction to a sacrificial offering instead of fasting has come in the hadith of Ibn 'Abbas: that the sister of 'Uqbah ibn 'Amir made a vow... and it will come from the author at number (3296).
And its chain is sound.
See also what follows it and what will come at number (3299).

(1) Sound like the one preceding it, without the mention of fasting in it. Ibn Jurayj: he is 'Abd al-Malik ibn 'Abd al-'Aziz.
See what precedes it.

(2) Its chain is weak due to the poor memory of Sharik — and he is Ibn 'Abd Allah al-Qadi. Al-Bayhaqi said in 10/80: Sharik al-Qadi alone transmitted it. Abu al-Nadr: he is Hashim ibn al-Qasim ibn Muslim al-Laythi, and Kurayb: he is Ibn Abi Muslim, freed slave of Ibn 'Abbas.
Ahmad also transmitted it (2828) and (2885), Abu Ya'la in his "Musnad" (2443), Ibn Khuzaymah (3046) and (3047), al-Tahawi in "Sharh Ma'ani al-Athar" 3/130, Ibn Hibban (4384), al-Hakim 4/302, and al-Bayhaqi 10/80, through multiple paths from Sharik, with this chain. =