An-Nisa 4:93

وَمَن يَقْتُلْ مُؤْمِنًا مُّتَعَمِّدًا فَجَزَآؤُهُۥ جَهَنَّمُ خَـٰلِدًا فِيهَا وَغَضِبَ ٱللَّهُ عَلَيْهِ وَلَعَنَهُۥ وَأَعَدَّ لَهُۥ عَذَابًا عَظِيمًا

Waman yaqtul mu'minan mutaʿammidan fajazāuhu jahannamu khālidan fīhā waghaḍiba l-lahu ʿalayhi walaʿanahu wa-aʿadda lahu ʿadhāban ʿaẓīman

But whoever kills a believer intentionally - his recompense is Hell, wherein he will abide eternally, and Allāh has become angry with him and has cursed him and has prepared for him a great punishment.