It is narrated from Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "The slain person will come to Allah holding his killer, his veins gushing with blood, and he will say: 'O my Lord! Ask this one why he killed me.' Allah will ask (the killer): 'Why did you kill him?' If he says: 'I killed him so that the honour might belong to so-and-so,' Allah will say: 'Honour belongs only to Allah.'"
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 10369