Kitāb al-Muʾmin
Hadith 33 - وعن الصادق عليه السلام قال: لو يعلم المؤمن ما له في المصائب من الاجر، لتمنى أن يقرض بالمقاريض
3. It has been narrated that al-Sadiq (a.s) said “If a believer knew what reward lies for him in suffering tribulations, he would wish he could be cut into pieces with a scissor.”