Al-Kāfi

Hadith 634
brotherhoodparadise
10ـ الْحُسَيْنُ بْنُ مُحَمَّدٍ عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنْ أَحْمَدَ بْنِ إِسْحَاقَ عَنْ بَكْرِ بْنِ مُحَمَّدٍ عَنْ أَبِي عَبْدِ الله (عَلَيهِ السَّلام) قَالَ مَا زَارَ مُسْلِمٌ أَخَاهُ الْمُسْلِمَ فِي الله وَلله إِلا نَادَاهُ الله عَزَّ وَجَلَّ أَيُّهَا الزَّائِرُ طِبْتَ وَطَابَتْ لَكَ الْجَنَّةُ.
10. Al-Husayn ibn Muhammad has narrated from [Ahmad ibn Muhammad] from Ahmad ibn Ishaq from Bakr ibn Muhammad from Abu ‘Abdillah (a.s.) who has said the following: “Whenever a Muslim visits his Muslim brother, due to Allah’s relation, and for the sake of Allah, Allah, the Majestic, the Glorious, will say, ‘O visitor, how beautiful is your deed! How beautiful is paradise as your reward! ’”
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī