It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that a questioner asked him: "O Abu al-Abbas, is there repentance for a killer?" Sayyiduna Ibn Abbas (may Allah be pleased with them both), as if amazed at his question, said: "What are you saying?" He repeated his question, and he again said: "What are you saying?" Two or three times (this happened). Then Sayyiduna Ibn Abbas (may Allah be pleased with them both) said: "How can there be repentance for him? I heard your Prophet (peace and blessings be upon him) say: 'The slain man will come (on the Day of Resurrection) holding his head in one of his hands, and with the other hand he will have seized his killer by the collar, his veins pouring with blood, until he brings him to the Throne. Then the slain man will say to the Lord of the worlds: "This one killed me?" Allah Almighty will say to the killer: "May you perish!" and he will be taken to Hell.'"
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Abdullah bin al-Fadl except Abu Uways, and his son Isma'il is alone in narrating it."
Hadith Referenceالمعجم الأوسط / باب العين / 4217
Hadith Takhrij«أخرجه الطبراني فى «الكبير» برقم: 10742»