Al-Kāfi
Hadith 5933ـ مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدِ بْنِ عِيسَى عَنِ ابْنِ فَضَّالٍ عَنْ عَلِيِّ بْنِ عُقْبَةَ عَنْ أَبِي عَبْدِ الله (عَلَيهِ السَّلام) قَالَ الْمُؤْمِنُ أَخُو الْمُؤْمِنِ عَيْنُهُ وَدَلِيلُهُ لا يَخُونُهُ وَلا يَظْلِمُهُ وَلا يَغُشُّهُ وَلا يَعِدُهُ عِدَةً فَيُخْلِفَهُ.
3. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad ibn ‘Isa from ibn Faddal from Ali ibn ‘Uqbah from Abu ‘Abdillah (a.s.) who has said the following: “The believer is a brother (in belief) of a believer, his eyes and his guide. He does not violate his trust, does not do injustice to him, or deceive him, and does not promise him only to ignore it later on.”’