Al-Kāfi - Volume 2 > Rare AHadith
Hadith #5

5ـ عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنِ النَّضْرِ بْنِ سُوَيْدٍ عَنِ الْقَاسِمِ بْنِ سُلَيْمَانَ عَنْ جَرَّاحٍ الْمَدَائِنِيِّ عَنْ أَبِي عَبْدِ الله (عَلَيهِ السَّلام) قَالَ انْظُرْ قَلْبَكَ فَإِنْ أَنْكَرَ صَاحِبَكَ فَاعْلَمْ أَنَّ أَحَدَكُمَا قَدْ أَحْدَثَ.

5. Ali ibn Ibrahim has narrated from his father from al-Al-Nadr ibn Suwayd from al-Qasim ibn Sulayman from Jarrah al-Mada’ini from abu ‘Abd Allah (a.s.) who has said the following: “See your heart. If it dislikes your friend then notice that one of you have done something newly wrong.’”