It is narrated from Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "A man will come holding another man by the hand and will say: O my Lord, this one killed me. Allah, the Mighty and Majestic, will say: Why did you kill him? He will say: So that the honour would be Yours. Allah will say: It is indeed Mine." He (peace and blessings be upon him) said: "And a man will come holding another man by the hand and will say: O my Lord, this one killed me. Allah will say: Why did you kill him? He will say: I killed him so that the honour would be for so-and-so. Allah will say: That honour does not belong to him; go back bearing your sin."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 10039