Sahih Muslim
The Book of Pilgrimage (Kitab Al-Hajj)
Book Number: 007 / Hadith Number: 2719
A'isha (Allah be pleased with her) reported Allah's Messenger (may peace be upon him) as saying: Five are the vicious beasts which should be killed even in the state of Ihram: scorpion, rat, kite, crow and voracious dog.