Quran's view on taking another soul (killing a Man)...

"If anyone killed a person unless it is for a murder or spreading mischief on earth it would be as it he killed the whole mankind, and if anyone who saved a life, it would be as if he saved the life of whole mankind" (5:32). "Then on that day not a soul will be wronged in the least and you shall but be prepaid in the needs of your past deeds" (36:54).