Sayyiduna Abu Hurayrah (may Allah be pleased with him) said that the Messenger of Allah (peace and blessings be upon him) slaughtered one cow on behalf of those of his wives who had performed Umrah.
Only al-Walid bin Muslim narrated it, and he did not mention in it that he heard it from al-Awza'i; Muhammad bin Isma'il al-Bukhari feared that he had taken it from Yusuf bin al-Safar. And Allah knows best.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 8780