توحيد الألوهية
Tāriq ibn Ashīm al-Ashja‘i (may Allah be pleased with him) reported that the Messenger of Allah (may Allah’s peace and blessings be upon him) said: “Whoever says, 'there is no god but Allah' and disbelieves in everything worshiped besides Allah, his property and blood becomes inviolable, and his reckoning will be with Allah.”
عن طارق بن أشيم الأشجعي مرفوعاً: "من قال لا إله إلا الله، وكَفَرَ بما يُعْبَدُ من دون الله حَرُمَ مالُه ودمُه وحِسابُه على الله".
شرح الحديث :
In this Hadīth the Prophet (may Allah's peace and blessings be upon him) clarifies that when two requirements are met, it becomes forbidden to kill someone and take his wealth : 1. saying: 'there is no god but Allah'. 2. Disbelieving in everything worshiped besides Allah. If these two conditions are fulfilled, it becomes incumbent to refrain from harming such a person, based on his apparent words, and to leave his inward faith to Allah, the Almighty. This applies as long as he does not commit a sin that makes it lawful to spill his blood, e.g. apostasy; to take his wealth, e.g. Zakah evasion; or to damage his reputation, e.g. procrastination in the repayment of debt.