Musnad Abu Ya'la al-Mawsili 110:115

Abu Abdullah ibn Abd al-Rahman al-Allaf narrated to us, Abd al-Malik ibn al-Khattab ibn Ubayd Allah ibn Abi Bakrah narrated to us, from Umarah ibn Abi Hafsah, from Ikrimah, from Ibn Abbas, from the Prophet (peace be upon him), who said: "Were it not that dogs are a community [of creatures], I would have ordered the killing of every jet-black dog. So kill the ones with two spots above their eyes among the dogs, for they are the cursed ones from among the jinn."