صحيح البخاري Sahih Bukhari كتاب الاستئذان The Book of Asking Permission
بَابُ إِذَا كَانُوا أَكْثَرَ مِنْ ثَلاَثَةٍ فَلاَ بَأْسَ بِالْمُسَارَّةِ وَالْمُنَاجَاةِ:

(47) Chapter. If in a gathering there are more than three persons, then there is no harm if two of them have a secret talk.

2 hadith
Hadith 6290
حَدَّثَنَا عُثْمَانُ ، حَدَّثَنَا جَرِيرٌ ، عَنْ مَنْصُورٍ ، عَنْ أَبِي وَائِلٍ ، عَنْ عَبْدِ اللَّهِ رَضِيَ اللَّهُ عَنْهُ ، قَالَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ : " إِذَا كُنْتُمْ ثَلَاثَةً ، فَلَا يَتَنَاجَى رَجُلَانِ دُونَ الْآخَرِ حَتَّى تَخْتَلِطُوا بِالنَّاسِ أَجْلَ أَنْ يُحْزِنَهُ " .
Narrated `Abdullah: The Prophet said, "When you are three persons sitting together, then no two of you should hold secret counsel excluding the third person until you are with some other people too, for that would grieve him."
Hadith Reference Sahih Bukhari / The Book of Asking Permission / Hadith: 6290
Hadith Grading محدثین: أحاديث صحيح البخاريّ كلّها صحيحة
Hadith 6291
حَدَّثَنَا عَبْدَانُ ، عَنْ أَبِي حَمْزَةَ ، عَنِ الْأَعْمَشِ ، عَنْ شَقِيقٍ ، عَنْ عَبْدِ اللَّهِ ، قَالَ : قَسَمَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَوْمًا قِسْمَةً ، فَقَالَ رَجُلٌ مِنَ الْأَنْصَارِ : إِنَّ هَذِهِ لَقِسْمَةٌ مَا أُرِيدَ بِهَا وَجْهُ اللَّهِ ، قُلْتُ : أَمَا وَاللَّهِ لَآتِيَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ ، فَأَتَيْتُهُ وَهُوَ فِي مَلَإٍ فَسَارَرْتُهُ ، فَغَضِبَ حَتَّى احْمَرَّ وَجْهُهُ ، ثُمَّ قَالَ : " رَحْمَةُ اللَّهِ عَلَى مُوسَى أُوذِيَ بِأَكْثَرَ مِنْ هَذَا فَصَبَرَ " .
Narrated `Abdullah: One day the Prophet divided and distributed something amongst the people whereupon an Ansari man said, "In this division Allah's Countenance has not been sought." I said, "By Allah! I will go (and inform) the Prophet." So I went to him while he was with a group of people, and I secretly informed him of that, whereupon he became so angry that his face became red, and he then said, "May Allah bestow His Mercy on Moses (for) he was hurt more than that, yet he remained patient."
Hadith Reference Sahih Bukhari / The Book of Asking Permission / Hadith: 6291
Hadith Grading محدثین: أحاديث صحيح البخاريّ كلّها صحيحة