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
اللَّهُمَّ إِنِّي أَسْأَلُكَ نَفْسًا بِكَ مُطْمَئِنَّةً
Allahumma inni as'aluka nafsan bika mutma'innah
O Allah, I ask You for a soul that is at peace with You.
Source
Quran — The Holy Quran — Surah Ar-Ra'd 13:28
Authenticity: Authentic — Quranic verse
The defining verse for heart's tranquility in Islam.
Hadith — Sahih Muslim — Sahih Muslim 2700
Authenticity: Sahih (Authentic)
Hadith regarding the descent of Sakeenah upon those who gather to remember Allah.