Al-Kāfi - Volume 2 > Compassion and Leniency
Hadith #3

3ـ عَنْهُ عَنْ مُحَمَّدِ بْنِ سِنَانٍ عَنْ عَبْدِ الله بْنِ يَحْيَى الْكَاهِلِيِّ قَالَ سَمِعْتُ أَبَا عَبْدِ الله (عَلَيهِ السَّلام) يَقُولُ تَوَاصَلُوا وَتَبَارُّوا وَتَرَاحَمُوا وَتَعَاطَفُوا.

3. It is narrated from him (narrator of the Hadith above) from Muhammad ibn Sinan from ‘Abd Allah ibn Yahya al-Kahili who has said the following: “I heard abu ‘Abd Allah (a.s.) saying, ‘Maintain good relations among yourselves, do good to one another, be compassionate and lenient to each other.’”