Al Quran: Aur jo koi kisi Momeen ko Jaan boojh kar ( intentionaly) Qatl kare uski saza Dojakh hai

Bismillahirrahmanirrahim

Al Quran:  Aur jo koi kisi Momeen  ko Jaan boojh kar ( intentionaly) Qatl kare uski saza Dojakh hai jismein wo hamesha rahega us par ALLAH ka ghazab aur uski laanat hai aur ALLAH ne uske liye bada Azab tayyar kiya hai
Al Quran Surah An Nisa (4), 93

Hadith: Abdullah bin Umar Radhi Allahu Anhuma se rivayat hai ki Rasool-Allah Sal-Allahu Alaihi Wasallam  ne farmaya mere baad kaafir na ban jana ki tum ek dusre ki garden maarne (yani Qatl karney) lag jao
Sahih Bukhari, Vol 8, 6868

Abdullah bin masood Radiallahu anhu se rivayat hai ki Rasool-Allahu Sal-Allahu Alaihi Wasallam ne farmaya Musalmaan ko gaali dena fusuq ( bura kaam) hai aur musalman ko Qatl karna kufr hai

Sahih Bukhari, Iman ka Bayan,No. 48

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Al Quran: And whoever kills a believer intentionally, his recompense is Hell to abide therein; and the Wrath and the Curse of ALLAH are upon him, and a great punishment is prepared for him.
Al Quran Surah An Nisa (4) :93

Hadith: Narrated 'Abdullah bin 'Umar Radhi Allahu Anhuma : The Prophet Sal-Allahu Alaihi Wasallam said, "After me do not become disbelievers, by striking (cutting) the necks of one another.
Sahih Bukhari, Volume 9, Book 83, Number 7:

Narrated 'Abdullah bin masood Radiallahu anhu : The Prophet Sal-Allahu Alaihi Wasallam said, "Abusing a Muslim is Fusuq (an evil doing) and killing him is Kufr (disbelief)."
Sahih Bukhari, Vol 1, Book 2, No. 47: