Dhikr — The Water of the Heart, the Breath of the Qur'an

Dhikr, tasbīḥ, taḥmīd, takbīr, tahlīl, istighfār, ṣalawāt, tafakkur — the Qur'anic semantic field of remembrance; reciprocal dhikr and the heart's tranquility. Classical tafsir sources.