It is narrated from Sayyiduna Abdullah bin Amr (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "Faith wears out inside one of you just as a garment wears out, so recite the Qur'an; reciting the Qur'an renews faith in your hearts."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 13681