حَدَّثَنَا يَحْيَى بْنُ يَحْيَى، قَالَ قَرَأْتُ عَلَى مَالِكٍ عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " إِذَا كَانَ ثَلاَثَةٌ فَلاَ يَتَنَاجَى اثْنَانِ دُونَ وَاحِدٍ " .
Ibn Umar reported Allah's Messenger (PBUH) as saying: When there are three (persons), two should not converse secretly between themselves to the exclusion of the (third) one. Translation Not Available
Book Ref: Sahih Muslim Book 39 Hadith 5419
Web Ref: Sahih Muslim Book 26 Hadith 2183 a