Sh Islam Ibn Baaz rahimahu’Allah said,

“The best thing which is recommended for curing the heart and its hardness is giving much attention to the Noble Quran, pondering over the Quran and by reciting and reflecting over its meanings, For verily reciting the Quran while pondering over its meanings as well as reciting the following words of remembrance

سبحان الله
والحمد الله
ولا إله إلا الله
والله أكبر
وسبحان الله وبحمده سبحان الله العظيم
لا إله إلا الله وحده لا شريك له له الملك وله الحمد يحيي ويميت وهو على كل شيء قدير

all of these are from the means of removing hardness from the heart.” End translation. [Majmoo Fatwaa]

Translated by

Yassin As-Somalee
Abu Aisha