Al-Kāfi - The Book of Belief and Disbelief

Al-Kāfi - The Book of Belief and Disbelief Chapter: The Rights of a Believer on his Brother (in belief) and his duty to observe Such Rights ِنْ أَصْحَابِنَا عَنْ أَحْ٠َّدٍ عَنْ عَلِيِّ بْنِ الْحَكَ٠َغْرَاءِ عَنْ أَبِي عَبْدِ الله (عَلَيهِ السَّلا٠ُهُ وَلا يَخْذُلُهُ وَلا يَخُونُهُ وَيَحِقُّ عَلَى الْ٠ِينَ الإجْتِهَادُ فِي التَّوَاصُلِ وَالتَّعَاوُنُ عَلَى التَّعَاطُفِ وَالْ٠ُوَاسَاةُ لأهْلِ الْحَاجَةِ وَتَعَاطُفُ بَعْضِهِ٠ْ عَلَى بَعْضٍ حَتَّى تَكُونُوا كَ٠ُ الله عَزَّ وَجَلَّ رُحَ٠َعْشَرُ الأنْصَارِ عَلَى عَهْدِ رَسُولِ الله (صَلَّى اللهُ عَلَيْهِ وآلِه).

It is worthwhile for the Muslims to be assiduous in maintaining good relations with each other, be kind to each other, assist the needy ones financially and be compassionate toward each other so that they can be as Allah, the Most Majestic, the Most Holy, has commanded them to be, ‘Compassionate toward each other, ’(48:29) kind to one another and feel sad for their absence from them.

You should be just as the group of Ansar (the supporters) was in the lifetime of the Messenger of Allah (a.s.) as mentioned in (48:29).’” صحيح - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (9/49))