وَلاَ تَقْتُلُواْ النَّفْسَ الَّتِي حَرَّمَ اللّهُ إِلاَّ بِالحَقِّ وَمَن قُتِلَ مَظْلُومًا فَقَدْ جَعَلْنَا لِوَلِيِّهِ سُلْطَانًا فَلاَ يُسْرِف فِّي الْقَتْلِ إِنَّهُ كَانَ مَنْصُورًا
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سورة الإسراء
(17/33) And slay not anyone whom Allah hath forbidden except for justification; and whosoever is slain wrongfully, We have surely given his next-of-kin authority so let him not be extravagant in slaying; verily he is ever succoured.
Surah Al-Isra