Narrated Ibn `Umar: Allah's Apostle said, "The example of the person who knows the Qur'an by heart is like the owner of tied camels. If he keeps them tied, he will control them, but if he releases them, they will run away."
Hadith Referenceصحيح البخاري / كتاب فضائل القرآن / 5031
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة
Narrated `Abdullah: The Prophet said, "It is a bad thing that one of them should say, 'I have forgotten such-and-such Verse (of the Qur'an),' for indeed, he has been caused (by Allah) to forget it. So keep on reciting the Qur'an, because it escapes from the hearts of men faster than camels do."
Hadith Referenceصحيح البخاري / كتاب فضائل القرآن / 5032
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة
Narrated Abu Musa: The Prophet said, "Keep on reciting the Qur'an, for, by Him in Whose Hand my life is, Qur'an runs away (is forgotten) faster than camels that are released from their tying ropes."
Hadith Referenceصحيح البخاري / كتاب فضائل القرآن / 5033
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة