كتاب البيوع
21  
The Book of Transactions
(7)
Chapter: Ruling on selling Al-Musarrah (An animal in whose udder milk has been allowed to accumulate)
(7)
باب حُكْمِ بَيْعِ الْمُصَرَّاةِ ‏‏
Sahih Muslim 1524 d

Abu Huraira (Allah be pleased with him) reported Allah's Messenger (ﷺ) as saying:

He who buys a goat having its udder tied up has two courses left for him. He may retain it, and if he desires may return it along with a sa' of dates and not wheat.
حَدَّثَنَا ابْنُ أَبِي عُمَرَ، حَدَّثَنَا سُفْيَانُ، عَنْ أَيُّوبَ، عَنْ مُحَمَّدٍ، عَنْ أَبِي هُرَيْرَةَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏ "‏ مَنِ اشْتَرَى شَاةً مُصَرَّاةً فَهُوَ بِخَيْرِ النَّظَرَيْنِ إِنْ شَاءَ أَمْسَكَهَا وَإِنْ شَاءَ رَدَّهَا وَصَاعًا مِنْ تَمْرٍ لاَ سَمْرَاءَ ‏"‏ ‏.‏
Reference : Sahih Muslim 1524d
In-book reference : Book 21, Hadith 33
USC-MSA web (English) reference : Book 10, Hadith 3637
  (deprecated numbering scheme)