1240 - He said: Abu 'Abd Allah narrated to us, he said: Waki' narrated to us, he said: Sufyan narrated to us, from Mutarrif ibn Tarif al-Harithi, from Abu al-Safar Sa'id ibn Ahmad al-Thawri (of Thawr Hamdan), from Najiyah, from Ibn 'Abbas, who said: "They are the two ambiguous [sins]: polytheism and killing."