(35) Muhammad bin Uthman narrated from Ahmad from Affan and Yahya bin Iss’haq as-Saleheeni from Hammad bin Salama from Abdullah bin Uthman from Abut-Tufayl that Abdullah bin Umar had said to him: “O Abut-Tufayl, Count twelve ones of bani Ka’b bin Lu’ay and then fighting and killing occur.”