Mishkat al-Masabih 11 Business Transactions كتاب البيوع 169

عَن أبي هُرَيْرَة رَفَعَهُ قَالَ: ” إِنَّ اللَّهَ عَزَّ وَجَلَّ يَقُولُ: أَنا ثَالِث الشَّرِيكَيْنِ مَا لم يخن صَاحِبَهُ فَإِذَا خَانَهُ خَرَجْتُ مِنْ بَيْنِهِمَا ” . رَوَاهُ أَبُو دَاوُد وَزَاد رزين: «وَجَاء الشَّيْطَان»

Abu Huraira traced to the Prophet the statement that God who is great and glorious says, “I make a third with two partners as long as one of them does not cheat the other, but when he cheats him I depart from them.” Abu Dawud transmitted it and Razin added, “and the devil comes.”