Kitāb al-Muʾmin

Hadith 121
brotherhoodday-of-judgement
121 - وعن الصادق عليه السلام: من فرج عن أخيه المسلم كربة فرج الله عنه كربة يوم القيامة، ويخرج من قبره مثلوج الصدر
121. It has been related that al-Sadiq (a.s) said: One who relieves a distress from his Muslim brother, Allah will remove a distress from him on the Day of Resurrection and he shall come forth from his grave delighted.
Source: Ḥusayn b. Saʿīd al-Ahwāzī