مِنْ اَجْلِ ذٰلِكَ ۛ كَتَبْنَا عَلٰى بَنِيْٓ اِسْرَاۤءِيْلَ اَنَّهٗ مَنْ قَتَلَ نَفْسًاۢ بِغَيْرِ نَفْسٍ اَوْ فَسَادٍ فِى الْاَرْضِ فَكَاَنَّمَا قَتَلَ النَّاسَ جَمِيْعًاۗ وَمَنْ اَحْيَاهَا فَكَاَنَّمَآ اَحْيَا النَّاسَ جَمِيْعًا ۗوَلَقَدْ جَاۤءَتْهُمْ رُسُلُنَا بِالْبَيِّنٰتِ ثُمَّ اِنَّ كَثِيْرًا مِّنْهُمْ بَعْدَ ذٰلِكَ فِى الْاَرْضِ لَمُسْرِفُوْنَ ( المائدة: ٣٢ )
min ajli zaalika katabnaa 'alaa Banee Israaa'eela annahoo man qatala nnafsam bighairi nafsin aw fasaadin fil ardi faka annnamaa qatalan fil ardi faka annammaa qatalan naasa jamee'anw wa man ahyaahaa faka annamaaa ahyan naasa jamee'aa; wa laqad jaaa'at hum Rusulunaa bilbaiyinaati summa inna kaseeram minhum ba'da zaalika fil ardi lamusrifoon (al-Māʾidah 5:32)
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. (Al-Ma'idah  : 32)
1 Mufti Taqi Usmani
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.