حَدَّثَنَا هِشَامُ بْنُ عَمَّارٍ، حَدَّثَنَا سُفْيَانُ بْنُ عُيَيْنَةَ، عَنْ عَبْدِ اللَّهِ بْنِ دِينَارٍ، عَنِ ابْنِ عُمَرَ، قَالَ نَهَى رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ أَنْ يَتَنَاجَى اثْنَانِ دُونَ الثَّالِثِ .
It was narrated that Ibn 'Umar said: "The Messenger of Allah(PBUH) forbade two to converse (privately) to the exclusion of a third." Translation Not Available
Book Ref: Sunan Ibn Majah Book 33 Hadith 3776
Web Ref: Sunan Ibn Majah Vol 5 Book 33 Hadith 3776