It is narrated from Hazrat Uqbah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: The one who recites the Qur'an aloud is like one who gives charity openly, and the one who recites the Qur'an quietly is like one who gives charity secretly.
Hadith Referenceمسند احمد / مسند الشاميين / 17796
Hadith Gradingحکم دارالسلام:حديث صحيح، وهذا إسناد قوي