أَعُوذُ بِكَلِمَاتِ اللَّهِ التَّامَّاتِ مِنْ شَرِّ مَا خَلَقَ
A'udhu bi kalimatillahit-tammati min sharri ma khalaq
I seek refuge in Allah's perfect words from the harm of anything He has created.
Sahih Muslim reports that whoever says it on stopping at a place will not be harmed there until leaving. Sunan Abi Dawud and Sunan Ibn Majah encourage saying it in the evening.