The Holy Quran 4:93 — Surah An-Nisa
Arabic text
وَمَن يَقْتُلْ مُؤْمِنًا مُّتَعَمِّدًا فَجَزَآؤُهُۥ جَهَنَّمُ خَـٰلِدًا فِيهَا وَغَضِبَ ٱللَّهُ عَلَيْهِ وَلَعَنَهُۥ وَأَعَدَّ لَهُۥ عَذَابًا عَظِيمًا
Translation
Whoever purposely murders (deliberately) a Mu'min (regarding his act as a permissible act), his punishment shall be Jahannam where he shall live forever (as long as Allaah wills). Allaah shall be angry with him, curse him and prepare for him a dreadful (mighty) punishment.
Tafsir (excerpt) — Tafsir Usmani
The punishment for intentional killing: that is, if one Muslim kills another Muslim not by mistake but deliberately, knowing him to be a Muslim, then for him in the Hereafter there is Jahannam (Hell), curse and a great punishment; he will not be released from it by kaffarah (expiation).
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