‏الحج : Hadeeth No:2719 A'isha (Allaah be pleased with her) reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: Five are the vicious beasts which should be killed even in the state of Ihram: scorpion, rat, kite, crow and voracious dog....

‏السلام : Hadeeth No:5477 Ibn Umar reported Allaah's Prophet (sallAllaahu alayhi wa sallam) as saying: Fever is due to vehemence of the beat of Hell, so cool it with water....