Ibn ‘Umar reported the Prophet as saying, “He who studies the Qur’ān is like the owner of tethered camels. If he pays attention to them he keeps hold of them, but if he lets them loose they go away."
Ibn Mas’ūd reported God’s messenger as saying, “It is wrong for one to say that he has forgotten such and such a verse, for he has been made to forget. Study the Qur’ān, for it is more apt to escape from men’s minds than animals.”
(Bukhārī and Muslim, Muslim adding "which are tethered”.)
Jundub b. ‘Abdallāh reported God’s messenger as saying, “Recite the Qur’ān as long as you can concentrate on it, but when your concentration flags give it up.”
Abū Mūsā al-Ash’arī reported God’s messenger as saying, “Keep refreshing your knowledge of the Qur’ān, for I swear by Him in whose hand my soul is that it is more liable to escape than camels which are tethered.”
