Sayyiduna Abdullah bin Amr (may Allah be pleased with him) reports that the Messenger of Allah (peace and blessings be upon him) said: "The one whose knowledge does not benefit him, his ignorance will harm him. Recite the Qur'an, for it will prevent you (from evil); if it does not prevent you, then (it is as if) you have not recited it at all."
Hadith Referenceمسند الشهاب / 741
Hadith Gradingمحدثین:سنادہ ضعیف جدا
Hadith Takhrijإسنادہ ضعیف جدا ، دیکھئے حدیث نمبر 392 ۔