Hadith 1573
Abu Hurairah (May Allah be pleased with him) said:
وعن أبي هريرة رضي الله عنه أن رسول الله صلى الله عليه وسلم قال: "إياكم والظن، فإن الظن أكذب الحديث" ((متفق عليه)).
The Messenger of Allah (ﷺ) said, "Beware of suspicion, for suspicion is the worst of false tales." [Al-Bukhari and Muslim].
In plain words
Be on guard against suspicion, for assuming the worst about people is the most false kind of talk. A thought built on no evidence can lead the heart badly astray.
Reference : Riyad as-Salihin 1573 In-book reference : Book 17, Hadith 63