Imam Al-Nawawi’s Riyad-us-Saliheen
Prohibition of Suspicion
Allah, the Exalted, says:
“O you who believe! Avoid much suspicions, indeed some suspicions are sins.” (49:12)
1573. Abu Hurairah (May Allah be pleased with him) said: The Messenger of Allah (sallallaahu alayhi wa sallam) said, “Beware of suspicion, for suspicion is the worst of false tales.”
[Al-Bukhari and Muslim].