Trade
باب الشروط في البيعSahih Muslim 4098
SahihJābir ibn ‘Abdullāh (may Allah be pleased with him) reported: I was traveling on a camel and it got exhausted, and I decided to release it. However, the Prophet (may Allah's peace and blessings be upon him) caught up with me, supplicated for me, and struck it. Thereupon, it started to walk like never before. Then, he said: "Sell it to me for an ounce." I said: ‘No.’ He again said: "Sell it to me." So, I sold it to him for an ounce, but made the stipulation that I should be allowed to ride it back to my family. Then, when I reached home, I took the camel to him and he paid me its price on the spot. As I went back, he sent someone after me and said: "Do you think I bargained with you to take your camel? Take your camel and your dirhams; these are yours."
Sahih al-Bukhari 2140
SahihAbu Hurayrah (may Allah be pleased with him) reported: The Messenger of Allah (may Allah's peace and blessings be upon him) forbade the town-dweller to sell (merchandise) on behalf of a Bedouin. And not to practice Najsh (offering a high price for a thing which you do not really want to buy in order to raise its price value and deceive other buyers). No Muslim should offer more for a thing already bought by his Muslim brother, nor should he propose to a women already engaged to another Muslim. A Muslim woman should not ask that her sister (i.e. another Muslim woman) be divorced in order to invert her plate (i.e. an idiom meaning to deprive her of what she has in order to take her place).