Al-Imām ibn al-Qayyim [may Allāh have mercy on him] said:

“Sorrow and anguish caused by past events cannot be erased by mere mourning, however, it can be alleviated by practicing the following:

‘Accepting Allāh’s Decree, expressing gratitude, enduring patience, believing in pre-destination, and uttering the statement: ‘It is the decree of Allāh, and He does what He wills.’”

Zād al-Ma‘ād, 2/327 | Al-Imām ibn al-Qayyim [may Allāh have mercy on him]

Translation: Authentic Quotes