Hadith 237
´It was narrated that Anas bin Malik said:` "The Messenger of Allah said: 'Some people open the door to good and close the door to evil, and some people open the door to evil and close the door to good. Glad tidings to those in whose hands Allah places they keys to good, and woe to those in whose hands Allah places the keys to evil.'"
Hadith 3469
´It was narrated that Abu Hurairah said:` “Mention of fever was made in the presence of the Messenger of Allah (ﷺ), and a man cursed it. The Prophet (ﷺ) said: ‘Do not curse it, for it erases sin as fire removes filth from iron.’”