Ala bi-dhikrillahi tatma'innul-qulub.
Surely, in the remembrance of Allah do hearts find rest.
Quran — Quran — Surah Ar-Rad 13:28
Authenticity: Quran
Meaning and Explanation
When to Recite
How to Recite
Important Notes
Benefits
Additional Duas
رَبِّ اشْرَحْ لِي صَدْرِي وَيَسِّرْ لِي أَمْرِي
Rabbi-shrah li sadri wa yassir li amri
My Lord, expand for me my chest [with assurance] and ease for me my task.
Source
Quran — The Holy Quran — Surah Ar-Ra'd 13:28
Authenticity: Authentic — Quranic verse
Direct evidence that dhikr is the primary medicine for heart's unease.
Hadith — Sahih Muslim — Sahih Muslim 2700
Authenticity: Sahih (Authentic)
Hadith describing how calmness (Sakeenah) descends upon those remembering Allah.