حَدَّثَنَا أَحْمَدُ بْنُ عَبْدَةَ، حَدَّثَنَا حَمَّادُ بْنُ زَيْدٍ، عَنْ ثَابِتٍ الْبُنَانِيِّ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ مَا رَأَيْتُ رَسُولَ اللَّهِ ـ صلى الله عليه وسلم ـ أَوْلَمَ عَلَى شَىْءٍ مِنْ نِسَائِهِ مَا أَوْلَمَ عَلَى زَيْنَبَ فَإِنَّهُ ذَبَحَ شَاةً ‏.‏

It was narrated that Anas bin Malik said: “I never saw the Messenger of Allah give a wedding feast for any of his wives like the feast he gave for Zainab, for which he slaughtered a sheep.” Translation Not Available

Book Ref: Sunan Ibn Majah Book 9 Hadith 1908
Web Ref:  Sunan Ibn Majah Vol 3 Book 9 Hadith 1908