The Messenger of Allah ﷺ said, "Beware of suspicion, for suspicion is the most false of speech…"
أن رسول الله ﷺ قال: إياكم والظن، فإن الظن أكذب الحديث…
Malik narrated it in Husn al-Khuluq (15), from Abu Zinad, from Araj, from Abu Hurairah, and he mentioned it.Bukhari narrated it in al-Adab (6066), and Muslim in al-Birr wa al-Silah wa al-Adab (2563), both of them through the route of Malik, similarly.