Al-Kāfi - Volume 2 > Compassion and Leniency
Hadith #2

2ـ مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدِ بْنِ عِيسَى عَنْ مُحَمَّدِ بْنِ سِنَانٍ عَنْ كُلَيْبٍ الصَّيْدَاوِيِّ عَنْ أَبِي عَبْدِ الله (عَلَيهِ السَّلام) قَالَ تَوَاصَلُوا وَتَبَارُّوا وَتَرَاحَمُوا وَكُونُوا إِخْوَةً بَرَرَةً كَمَا أَمَرَكُمُ الله عَزَّ وَجَلَّ.

2. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad ibn ‘Isa from Muhammad ibn Sinan from Kulayb al-Saydawi from abu ‘Abd Allah (a.s.) who has said the following: “Maintain good relations among yourselves, do good to each other, be compassionate with one another and be virtuous brothers as Allah, the Most Majestic, the Most Holy, has commanded you to be.”