Hazrat Alaa bin Abdul Kareem says that I heard Hazrat Mujahid explaining the meaning of this verse as follows: { وَمَنْ أَحْیَاہَا فَکَأَنَّمَا أَحْیَا النَّاسَ جَمِیعًا } Translation: And whoever saved a life, it is as if he saved all of humanity. That is, the person who refrained from killing him, indeed he gave him life.