Allah the Exalted said:
٢٧٢ - باب النهي عن سوء الظن بالمسلمين من غير ضرورة
Allah the Exalted said:
O you who have believed, avoid much [negative] assumption. Indeed, some assumption is sin. And do not spy or backbite each other. Would one of you like to eat the flesh of his brother when dead? You would detest it. And fear Allāh; indeed, Allāh is Accepting of Repentance and Merciful.
Abū Hurayrah (may Allah be pleased with him) reported that the Messenger of Allah ﷺ said: “Beware of suspicion, for suspicion is the most untruthful of speech.” Agreed upon.