Narrated Abu Sa'id Al-Khudri:
Allah's Apostle said, "The thing I am afraid of most for your sake, is the worldly blessings which Allah will bring forth to you." It was said, "What are the blessings of this world?" The Prophet said, "The pleasures of the world." A man said, "Can the good bring forth evil?" The Prophet kept quiet for a while till we thought that he was being inspired divinely. Then he started removing the sweat from his forehead and said," Where is the questioner?" That man said, "I (am present)." Abu Sa'id added: We thanked the man when the result (of his question) was such. The Prophet said ..