The Book of the Prohibited actions

Riyad as-Salihin · Chapter 272

Prohibition of Suspicion

باب النهي عن سوء الظن بالمسلمين من غير ضرورة

Suspicion, su' az-zann in Arabic, is thinking ill of a fellow Muslim without cause. This brief chapter isolates it as the root from which spying, backbiting, and broken ties all grow, which is why it is named the worst of false tales.

The single hadith is short but searching. Buruja's takeaway is practical: when a thought about someone's wrong arrives unbidden, do not build a story on it, look instead for the better explanation and refuse to let the suspicion harden into conviction.

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