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
Abu Huraira reported Allah's Apostle (ﷺ) as saying:
He who would get into Paradise (would be made to enjoy such an everlasting) bliss that he would neither become destitute, nor would his clothes wear out, nor his youth would decline.
Reference: Sahih Muslim 2836 In-book : Book 53, Hadith 25 USC-MSA web (English) : Book 40, Hadith 6802 (deprecated)
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