Mukhtasar Bukhari

Narrated by Sayyiduna Abu Hurairah (may Allah be pleased with him) from the Prophet Muhammad (peace and blessings be upon him) that he said: "Whoever buys a goat whose udder has been withheld (from milking), and he milks the goat—if he is pleased, he should keep it, and if he is displeased, he should return it and give one sa’ of dates in exchange for the milk."