The Prophet (ﷺ) 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.
Reference: Sunan Abi Dawud 3446 In-book : Book 24, Hadith 31 English translation : Book 23, Hadith 3439
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