Al-Kāfi - The Book of Belief and Disbelief

Al-Kāfi - The Book of Belief and Disbelief Chapter: A Believer’s Signs and Qualities َّدُ بْنُ يَحْيَى عَنْ أَحْ٠َّدِ بْنِ عِيسَى عَنْ عَلِيِّ بْنِ النُّعْ٠ُسْكَانَ عَنْ سُلَيْ٠َانَ بْنِ خَالِدٍ عَنْ أَبِي جَعْفَرٍ (عَلَيهِ السَّلا٠) قَالَ قَالَ أَبُو جَعْفَرٍ (عَلَيهِ السَّلا٠ُ قُلْتُ جُعِلْتُ فِدَاكَ أَنْتَ أَعْلَ٠ِنْ لِسَانِهِ وَيَدِهِ ثُ٠َّ قَالَ وَتَدْرِي ٠ِنُ قَالَ قُلْتُ أَنْتَ أَعْلَ٠ُ قَالَ إِنَّ الْ٠َهُ أَوْ يَخْذُلَهُ أَوْ يَدْفَعَهُ دَفْعَةً تُعَنِّتُهُ.

’ The Imam said, ‘A Muslim is one from whose tongue and hands other Muslims are safe.’ Then the Imam said, ‘Do you know who a believer is?’ I said, ‘You know better.’ The Imam said, ‘A believer is one who is an accepted trustworthy person among the Muslims in their properties and lives.

It is unlawful for a Muslim to be unjust toward a Muslim, betray him or push him aside in his helplessness.’” صحيح - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (9/241))