The Book of Transactions
21/7. Chapter:
Ruling on selling Al-Musarrah (An animal in whose udder milk has been allowed to accumulate)
Sahih Muslim
وَحَدَّثَنَاهُ ابْنُ أَبِي عُمَرَ، حَدَّثَنَا عَبْدُ الْوَهَّابِ، عَنْ أَيُّوبَ، بِهَذَا الإِسْنَادِ غَيْرَ أَنَّهُ قَالَ " مَنِ اشْتَرَى مِنَ الْغَنَمِ فَهُوَ بِالْخِيَارِ " .
Ayyub narrated with the same chain of transmitters but with this change of words: " He who buys a goat has the option...."
Reference : Sahih Muslim 1524eIn-book reference : Book 21, Hadith 34USC-MSA web (English) reference : Book 10, Hadith 3638