Sahih Muslim Book 32, Hadith Number 6217.
Chapter : Forbiddance of suspicion, fault-finding, and bidding against the other, (for raising the price).
This hadith has been narrated on the authority of A’mash with the same chain of transmitters (and the words are): “Don’t sever relations of kinship, don’t bear enmity against one another, don’t bear aversion against one another and don’t feel envy against the other and live as fellow-brothers as Allah has commanded you.