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
Ibn Abbas (Allah be pleased with them) reported Allah's Messenger (ﷺ) as saying:
He who buys food-rain should not sell it until he has taken possession of it. Ibn Abbas (Allah be pleased with them) said: I regard everything like food (so far as this principle is concerned).
Reference: Sahih Muslim 1525 c In-book : Book 21, Hadith 38 USC-MSA web (English) : Book 10, Hadith 3642 (deprecated)
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