Narrated Sa`d bin Abi Waqqas: The Prophet said, "The most sinful person among the Muslims is the one who asked about something which had not been prohibited, but was prohibited because of his asking."
Hadith ReferenceSahih Bukhari / The Book of Holding Fast To The Qur’An and The Sunna / Hadith: 7289
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة