Sunan Abi Dawud, Hadith 3439 ⓘ
Narrated Abdullah ibn Umar: The Prophet said: If anyone buys a sheep whose udders have been tied up, he has option for three days (for decision). If he returns it, he should return with it wheat equal to its milk or double of it.
حَدَّثَنَا أَبُو كَامِلٍ، حَدَّثَنَا عَبْدُ الْوَاحِدِ، حَدَّثَنَا صَدَقَةُ بْنُ سَعِيدٍ، عَنْ جُمَيْعِ بْنِ عُمَيْرٍ التَّيْمِيِّ، قَالَ سَمِعْتُ عَبْدَ اللَّهِ بْنَ عُمَرَ، يَقُولُ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " مَنِ ابْتَاعَ مُحَفَّلَةً فَهُوَ بِالْخِيَارِ ثَلاَثَةَ أَيَّامٍ فَإِنْ رَدَّهَا رَدَّ مَعَهَا مِثْلَ أَوْ مِثْلَىْ لَبَنِهَا قَمْحًا " .
also referenced under: Hadith 3446 (DarusSalam) & Book 23, Hadith 3439 (USC-MSA)