Bismillah hir-Rahman nir-Rahim
Hadith: Musalmaan ko gaali dena fusuq ( bura kaam) hai aur musalaman ko
Qatl karna kufr hai
Abdullah bin masood Radiallahu anhu se rivyat hai ki Rasoollallahu Sallallahu Alaihi Wasallam ne farmaya Musalmaan ko gaali dena fusuq ( bura kaam) hai aur musalaman ko Qatl karna kufr hai
Sahih Bukhari, Iman ka Bayan,No. 48
Narrated 'Abdullah bin masood Radiallahu anhu The Prophet Sallallahu 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: