It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him and his family) forbade fraudulent trade. Sayyiduna Ibn Umar (may Allah be pleased with them both) says: This was the method of trade among people in the Age of Ignorance; its form was that a person would sell a she-camel in exchange for the unborn offspring of another she-camel. The Messenger of Allah (peace and blessings be upon him and his family) forbade this.

It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) forbade fraudulent trade. Ayub says that Yahya bin Abi Kathir, while explaining fraudulent trade, said: The sale of a diver’s catch is a fraudulent transaction, the sale of a runaway slave is fraud, there is deception in the sale of a runaway camel, bargaining over the unborn young in the bellies of livestock is fraud, the sale of clay from the ears is a fraudulent transaction, and the sale of the milk in the udders of livestock is also based on fraud, except when measured.

It is narrated from Sayyiduna Abu Sa'id Khudri (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him and his family) forbade buying the unborn offspring of livestock before they are born, buying milk in the udders without measuring it, buying a runaway slave, buying spoils of war before they are distributed, buying charity before taking possession of it, and trading by divers.

It is narrated from Sayyiduna Ali (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him and his family) forbade the trade of the helpless, fraudulent trade, and the sale of dates before they ripen.

It is narrated from Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him and his family) said: Do not trade in fish that are in the water, because there is deception in it.

It is narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him and his family) forbade trade involving pebbles and transactions based on deception.

It is narrated from Sayyiduna Abu Sa'id Khudri (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him and his family) forbade the sale of Mulamasa, and Mulamasa is that a cloth is only touched and not examined (by looking at it). And he (peace and blessings be upon him and his family) also forbade the sale of Munabadhah, and Munabadhah is that a person, after making a deal, throws the cloth towards the other before he has turned it over or examined it.

It is narrated from Sayyiduna Abu Sa'id Khudri, may Allah be pleased with him, that the Messenger of Allah, peace and blessings be upon him, forbade two types of garments and two types of transactions. (The mention of garments is in another place.) The two transactions are: one is Munabadhah and the other is Mulamasah. Munabadhah is when a person says: When I throw this cloth towards you, the deal will be finalized. And Mulamasah is when a person touches the cloth, without trying it on or turning it over; as soon as he touches it, the deal is finalized.

A similar hadith is narrated from Sayyiduna Abu Hurairah, may Allah be pleased with him, in which it is mentioned: As for the matter of two trades, one is Mulamasah, and that is when they say to each other: You throw towards me and I throw towards you, and the second trade is throwing a stone.

It is narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) forbade Muhaqala and Muzabana. Muhaqala is when the grain in the ears of a crop is sold in exchange for wheat, and Muzabana is when the fruit on a tree is sold in exchange for dates.