Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates: Abu al-Qasim (peace and blessings be upon him) said: "Do not practice 'tasriya' (withholding milk in the udders) of camels and goats for the purpose of selling them. Whoever among you buys such an animal has two options: if he wishes, he may keep it, and if he wishes, he may return it along with one sa' of dates, not wheat."