Musnad Ahmad 27:488

Muhammad ibn Bakr narrated to us, Ibn Jurayj informed us, he said: Nafi’ said to me, Abdullah said: I heard the Prophet, peace and blessings of Allah be upon him, saying: "Five of the beasts are to be killed; there is no blame upon the one who kills them in killing them: the crow, the kite, the scorpion, the vicious dog, and the mouse."