Sayyidah Khawlah bint Hakim al-Sulamiyyah (may Allah be pleased with her) said: The Messenger of Allah (peace and blessings be upon him) said: "Whoever stops at a place and says: 'A'udhu bi-kalimatillahit-tammati min sharri ma khalaq' (I seek refuge in the perfect words of Allah from the evil of what He has created), nothing will harm him in that place until he departs."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 20975