Established Sunnahs of the Prophet
Magnanimity in buying and selling
On the authority of Jabir ibn 'Abdullah (may Allah be pleased with them both),
that the Messenger of Allah (peace and blessings of Allah be upon him) said:
"May Allah show mercy to a man who is magnanimous when he sells, when he buys, and when he demands his due."
Narrated by al-Bukhari.