Sayyidah Khawlah bint Hakim Salmiyyah (may Allah be pleased with her) narrates that I heard the Messenger of Allah (peace and blessings be upon him) say: "Whoever stops at a place and then recites this supplication: «‏‏‏‏أَعـوذُ بِكَلِـماتِ اللّهِ التّـامّاتِ مِنْ شَـرِّ ما خَلَـق» ‏‏‏‏ 'I seek refuge in the perfect words of Allah from the evil of what He has created,' nothing will harm him until he departs from that place."