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
I slapped a slave belonging to us and then fled away. I came back just before noon and offered prayer behind my father. He called him (the slave) and me and said: Do as he has done to you. He granted pardon. He (my father) then said: We belonged to the family of Muqarrin during the lifetime of Allah's Messenger (ﷺ. and had only one slave-girl and one of us slapped her. This news reached Allah's Apostle (ﷺ) and he said: Set her free. They (the members of the family) said: There is no other servant except she. Thereupon he said: Then employ her and when you can afford to dispense with her services, then set her free.
Reference: Sahih Muslim 1658 a In-book : Book 27, Hadith 49 USC-MSA web (English) : Book 15, Hadith 4081 (deprecated)
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