The command to fight the people until they say "La ilaha illallah Muhammad Rasul-Allah", and establish Salat, and pay the Zakat, and believe in everything that the prophet (ﷺ) brought. Whoever does that, his life and his wealth are protected except by its right, and his secrets are entrusted to Allah, the most high. Fighting those who withhold Zakat or other than that is one of the duties of Islam and the Iman should be concerned with the Laws of Islam
It has been narrated on the authority of Abu Huraira that the Messenger of Allah (ﷺ) said:
It is obligatory for you to listen to the ruler and obey him in adversity and prosperity, in pleasure and displeasure, and even when another person is given (rather undue) preference over you.
Reference: Sahih Muslim 1836 In-book : Book 33, Hadith 52 USC-MSA web (English) : Book 20, Hadith 4524 (deprecated)
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