Al-Kāfi
Hadith 22622ـ عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ أَبِي عَبْدِ الله عَنْ مُحَمَّدِ بْنِ عَلِيٍّ عَنْ يُونُسَ بْنِ يَعْقُوبَ عَنْ أَبِي الْحَسَنِ الأوَّلِ (عَلَيهِ السَّلام) قَالَ إِذَا كَانَ ثَلاثَةٌ فِي بَيْتٍ فَلا يَتَنَاجَى اثْنَانِ دُونَ صَاحِبِهِمَا فَإِنَّ ذَلِكَ مِمَّا يَغُمُّهُ.
2. A number of our people have narrated from Ahmad ibn abu ‘Abd Allah from Muhammad ibn Ali from Yunus ibn Ya’qub from abu al-Hassan, the first (a.s.) who has said the following: “Out of three people in one house, two of them should not hold a private conversation because it saddens the third.”