Al-Kāfi

Hadith 786
mourning-condolenceparadise
2ـ عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ أَحْمَدَ بْنِ مُحَمَّدِ بْنِ خَالِدٍ عَنْ أَبِيهِ عَنْ وَهْبٍ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ الْسَّلام) قَالَ قَالَ رَسُولُ الله (صلّى اللهُ عَلَيْهِ وَآلِه) مَنْ عَزَّى مُصَاباً كَانَ لَهُ مِثْلُ أَجْرِهِ مِنْ غَيْرِ أَنْ يَنْتَقِصَ مِنْ أَجْرِ الْمُصَابِ شَيْئاً.
2. A number of our people have narrated from Ahmad ibn Muhammad ibn Khalid from his father from Wahab who has said the following: “Abu ‘Abd Allah (a.s.), has said that the Messenger of Allah has said, ‘If one offers condolences to a depressed person, one will have a reward equal to his (depressed person’s) reward without any reduction in the reward for the latter, the sorrowful party.’”
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī