They will recite the Qur’an, but it will not go beyond their throats. The Qur’an is only beneficial when it reaches the heart and is firmly planted in it.

— ‘Abdullah ibn Mas‘ūd [d. 32H]

(Read on pg 13, Ibn Rajab, Ibn al-Qayyim, al-Ghazali, The Purification of the Soul. Al-Firdous Ltd. London:1993.)