Arabic Text
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ يُوسُفَ، أَخْبَرَنَا مَالِكٌ،. وَحَدَّثَنَا إِسْمَاعِيلُ، قَالَ حَدَّثَنِي مَالِكٌ، عَنْ نَافِعٍ، عَنْ عَبْدِ اللَّهِ، رضى الله عنه أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " إِذَا كَانُوا ثَلاَثَةٌ فَلاَ يَتَنَاجَى اثْنَانِ دُونَ الثَّالِثِ ".
English Translation
Narrated 'Abdullah: the Prophet said "When three persons are together, then no two of them should hold secret counsel excluding the third person."
This hadith is from Sahih al-Bukhari, the most rigorously authenticated collection in Islamic scholarship. No editorial opinion is added.