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
Tawus reported on the authority of Ibn 'Abbas (Allah be pleased with them) that Zaid b. Arqam went to him (Ibn 'Abbas) and said:
Narrate how you informed me about the meat of the game presented to the Messenger of Allah (ﷺ) as he was in the state of Ihram. Thereupon he said: He was presented with a slice of the meat of game, but he returned it to him (who presented it) saying: We are not going to eat it, as we are in the state of Ihram.
Reference: Sahih Muslim 1195 In-book : Book 15, Hadith 60 USC-MSA web (English) : Book 7, Hadith 2706 (deprecated)
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