The Prophet ﷺ said, "Beware of suspicion, for suspicion is the most untruthful form of speech. Do not spy on one another, do not compete against one another, do not turn your backs on one another, and do not hate one another. Be servants of Allah, brothers to each other."
حدثنا سريج بن النعمان قال حدثنا فليح عن هلال بن علي عن عبد الرحمن بن أبي عمرة
عن النبي ﷺ قال إياكم والظن فإن الظن أكذب الحديث ولا تجسسوا ولا تنافسوا ولا تدابروا ولا تباغضوا وكونوا عباد الله إخوانا
Its isnad is sahih, it has already appeared at 7333 and 9959. Fulayh is Ibn Sulayman bin Abu Mughira, the freed slave of Rafi, they deemed him trustworthy, and Ibn Hajar said, truthful but with many errors. However, here he has been corroborated in all his hadiths. Surayj bin Numan bin Marwan Luluyi, Abu Hasan, is trustworthy. Hilal bin Ali bin Usama was deemed trustworthy by many, Daraqutni approved of him, and Abu Hatim accepted him.