Qurrah bin Khalid al-Sadusi قرة بن خالد السدوسي · Prescribed Punishments (Kitab Al-Hudud)

The blood of a Muslim man who testifies that there is no god but Allah and that I am the Messenger of Allah should not be lawfully shed but only for one of three reasons: married fornicator, soul for soul, and one who deserts his religion separating himself from the community.