30. It has been narrated that Muhammad ibn Muslim said
I heard Abu 'Abd Allah (a.s) saying: No forty nights pass for a believer except a matter befalls him that grieves him and reminds him (of Allah).
30 - عن محمد بن مسلم قال
سمعت أبا عبد الله (ع) يقول المؤمنُ لا يمضي عليه أربعون ليلةً إلاّ عُرض له أمرٌ يحزِنه، ويُذكّره به.
Similar narrations
Kitāb al-Muʾmin #27I heard him (i.e. al-Sadiq (a.s)) say: No forty nights pass for a believer without something befalling him for which he is rewarded - the...