Riyad as-Salihin, Book 16, Hadith 1452 (In-Book) ⓘ

Abu Hurairah (May Allah be pleased with him) reported: A man came to the Prophet and said, "What a trouble I suffered from a scorpion which stung me last night!" He said, "Had you said in the evening: 'A'udhu bikalimatillahit-tammati min sharri ma khalaqa (I seek the protection of Allah's Perfect Words from the evil of whatever He has created),' it would not have harmed you."[Muslim].

وعنه قال‏:‏ جاء رجل إلى النبي صلى الله عليه وسلم، فقال‏:‏ يا رسول الله ما لقيت من عقرب لدغتني البارحة‏!‏ قال‏:‏ ‏ "‏أما لو قلت حين أمسيت‏:‏ أعوذ بكلمات الله التامات من شر ما خلق لم تضرك‏" ‏ ‏(‏‏(‏رواه مسلم‏)‏‏)‏‏.‏