Al-Ma'idah 5:32

Min ajli thalika katabna AAalabanee isra-eela annahu man qatala nafsan bighayri nafsinaw fasadin fee al-ardi fakaannama qatala annasajameeAAan waman ahyaha fakaannama ahyaannasa jameeAAan walaqad jaat-hum rusulunabilbayyinati thumma inna katheeran minhum baAAda thalikafee al-ardi lamusrifoon

Because of that, We decreed upon the Children of Israel that whoever kills a soul unless for a soul or for corruption [done] in the land - it is as if he had slain mankind entirely. And whoever saves one - it is as if he had saved mankind entirely. And Our messengers had certainly come to them with clear proofs. Then indeed many of them, [even] after that, throughout the land, were transgressors.

For this reason, We decreed for the children of Isrā’īl that whoever kills a person not in retaliation for a person killed, nor (as a punishment) for spreading disorder on the earth, is as if he has killed the whole of humankind, and whoever saves the life of a person is as if he has saved the life of the whole of humankind. Certainly, Our messengers have come to them with clear signs. Then, after all that, many of them are there to commit excesses on the earth.