Abu Bakra reported Allah's Messenger (ﷺ) as saying:
When two Muslims (confront each other) and the one amongst them attacks his brother with a weapon, both of them are at the brink of Hell-Fire. And when one of them kills his companion, both of them get into Hell-Fire.
Reference: Sahih Muslim 2888 d In-book : Book 54, Hadith 21 USC-MSA web (English) : Book 41, Hadith 6901 (deprecated)
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