Sunan Abi Dawud — Medicine (Kitab Al-Tibb) — Hadith No: 3898
Translation
Narrated AbuSalih Zakwan as-Samman: A man from Aslam tribe said: I was sitting with the Messenger of Allah (ﷺ). A man from among his Companions came and said: Messenger of Allah! I have been stung last night, and I could not sleep till morning. He asked: What was that? He replied: A scorpion. He said: Oh, had you said in the evening: "I take refuge in the perfect words of Allah from the evil of what He created," nothing would have harmed you, Allah willing