Imam Maalik مالك بن أنس بن مالك بن أبي عامر · The Chapters on Business Transactions

the Prophet (ﷺ) was treated with cupping and gave the cupper his wages.

"Beware of swearing oaths when selling, for it may help you to make a sale but it destroys the blessing."'

"When the Prophet (ﷺ) came to Al-Madinah, they were the worst people in weights and measures. Then Allah, Glorious is He revealed: "Woe to the Mutaffifun (those who give less in measure and weight)", and they were fair in weights and measures after that.

“While we were with the Messenger of Allah (ﷺ) on a journey, we saw some camels with their udders tied, among some thorny trees. We rushed towards it, but the Messenger of Allah (ﷺ) called us and we came back to him. He said: 'These camels belong to a family of Muslims, and this is their support (and blessing) after Allah. Would you be happy if you went back to your vessels and found that what was in them had…