al-Qasim ibn Muhammad القاسم بن محمد بن أبي بكر الصديق · The Chapters on Business Transactions

I heard Abu Sa'eed Al-Khudri say: "The Messenger of Allah (ﷺ) said: 'Transactions may only be done by mutual consent."'

“The Messenger of Allah (ﷺ) forbade selling what is in the wombs of cattle until they give birth, and selling what is in their udders unless it is measured out, and selling a slave who has fled, and selling spoils of war until it has been distributed, and selling Sadaqah until it has been received, and what a diver is going to bring up."

"Whoever sells a palm tree and sells a slave." Mentioning both of them together.

"O Allah, bless my nation in their early mornings (i.e., what they do early in the morning)." (Hasan)He said: "When he sent out a raiding party or an army, he would send them at the beginning of the day." He said: (1) "Sakhr was a man engaged in trade, and he used to send his goods out at the beginning of the day, and his wealth grew and increased."

"I said to 'Abdullah bin 'Umar: 'Can I pay in advance for a date palm before it bears fruit?' He said: 'No.' I said: 'Why not?' He said: 'A man paid in advance for a grove of trees during the time of the Messenger of Allah (ﷺ), before they had produced any fruit, and they did not bear anything that year. The purchaser said: 'They belong to me until they produce but the seller said: 'I only sold the trees…

the Prophet (ﷺ) asked a man to give as a loan a young camel and said: “When the camels of the Sadaqah come, we will pay you back.” When the camels came, he said: " O Abu Rafi', pay this man back for his Young camel." But all I could find was a seven-year-old camel or that which is better. I told the Prophet (ﷺ) and he said: "Give it to him, for the best of People are those who…

"I heard 'Irbad bin Sariyah say: 'I was with the Prophet (ﷺ) and a Bedouin said: "Pay me back for my young camel, and he gave him an older (i.e., better) camel." He said: 'O Messenger of Allah! It is older (i.e., better) than my camel.' The Messenger of Allah (ﷺ) said: 'The best of people are those who are best in repaying."'