Musakkin al-fuʾad ʿinda faqdi l-ahibbat wa l-awlad (Arabic: مُسَکّنُ الفُؤاد عِنْدَ فَقْدِ الْأحبّة وَ الْأولاد; literal translation: Soother of the heart upon the loss of loved ones and children) is a book in Arabic written by al-Shahid al-Thani (d.965/1557). The book is about ways to soothe and calm hearts of those who suffer from losses. Al-Shahid al-Thani wrote the book after the loss of his children to soothe his heart and those who grieved. Musakkin al-fu'ad includes an introduction, four chapters and an ending part. This book is regarded highly important among grand religious figures and it is translated a number of times.