Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates this statement of the Noble Prophet (peace and blessings of Allah be upon him): "Do not tie up the udders of camels and goats (to deceive buyers). Whoever buys such an animal after this, he will have the choice of two things: after milking it, if he likes it, he may keep the animal with him, and if he dislikes it, he may return it and also give one sa’ of dates."
Hadith Referenceصحیح ابن حبان / كتاب البيوع / 4970
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيصحيح - «الإرواء» (1320)، «البيوع»: ق.فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده صحيح على شرط الشيخين