As-Sakīnah (also written: Sakinah)

Dictionary meaning:

As-Sakīnah refers to deep inner calm, tranquility, and reassurance that Allah places in the heart. It is a state of serenity that removes fear, anxiety, and agitation, especially during moments of hardship, uncertainty, or trials. It is not just emotional calm, but a divinely granted peace that brings clarity, steadiness, and spiritual confidence.

Classical Islamic definition:

• A calmness from Allah that settles the heart

• A firmness and reassurance that strengthens faith

• A tranquil state that replaces fear with trust

Allah mentions As-Sakīnah multiple times in the Qur’an, for example:

“Then Allah sent down His sakīnah (tranquility) upon His Messenger and upon the believers…”

— Qur’an, Surah At-Tawbah 9:26

And:

“It is He who sent down sakīnah into the hearts of the believers so that they may increase in faith…”

— Qur’an, Surah Al-Fath 48:4

Classical Arabic dictionaries:

• Lisān al-ʿArab (لسان العرب): Defines sakīnah as peace, dignity, calmness, and reassurance of the heart.

• Al-Rāghib al-Isfahānī (Mufradāt Alfāẓ al-Qurʾān): Describes it as a divine stillness that removes fear and brings certainty.
  Simple English explanation:
  As-Sakīnah is the quiet peace Allah places in your heart when life feels heavy—when nothing outside changes, but inside, you feel steady.