Abu Hayyan Taymi narrates from his father that the Prophet Muhammad (peace be upon him) said: "Allah's grace is upon two partners as long as neither of them betrays his companion. When one of them betrays his companion, Allah withdraws His grace from both of them."
Hadith Referenceسنن الدارقطني / كتاب البيوع / 2934
Hadith Takhrij«أخرجه الحاكم فى ((مستدركه)) برقم: 2335، وأبو داود فى ((سننه)) برقم: 3383، والبيهقي فى((سننه الكبير)) برقم: 11541، 11542، والدارقطني فى ((سننه)) برقم: 2933، 2934»