Arabic (Original)
حَدَّثَنَا ابْنُ نُمَيْرٍ حَدَّثَنَا عُبَيْدُ اللَّهِ عَنْ نَافِعٍ عَنِ ابْنِ عُمَرَ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ إِذَا كَانُوا ثَلَاثَةً فَلَا يَتَنَاجَى اثْنَانِ دُونَ وَاحِدٍ.
English Translation
Ibn Numayr told us; Ubaydullah told us, from Nafi', from Ibn Umar: that the Messenger of Allah, peace and blessings be upon him, said: "When there are three of you, then two should not converse privately without the third one."