The Ansar said to the Prophet, "Divide our date-palms between us and our emigrant brothers." The Prophet said, "No." The Ansar said to the emigrants, "You may do the labor (in our gardens) and we will share the fruits with you." The emigrants said, "We hear and obey."
The Prophet (ﷺ) said, "No town-dweller should sell for a bedouin. Do not practice Najsh (i.e. Do not offer a high price for a thing which you do not want to buy, in order to deceive the people). No Muslim should offer more for a thing already bought by his Muslim brother, nor should he demand the hand of a girl already engaged to another Muslim. A Muslim woman shall not try to bring about The divorce of her sister…
Allah's Messenger (ﷺ) forbade (1) the meeting of the caravan (of goods) on the way, (2) and that a residing person buys for a bedouin, (3) and that a woman stipulates the divorce of the wife of the would-be husband, (4) and that a man tries to cause the cancellation of a bargain concluded by another. He also forbade An-Najsh (see Hadith 824) and that one withholds the milk in the udder of the animal so that he may deceive…
Allah's Messenger (ﷺ) mentioned a person who asked an Israeli man to lend him one-thousand Dinars, and the Israeli lent him the sum for a certain fixed period.
Allah's Messenger (ﷺ) said, "Allah has ninety-nine names, i.e. one-hundred minus one, and whoever knows them will go to Paradise." (Please see Hadith No. 419 Vol. 8)