Musnad Ahmad 1251:2

Muhammad ibn Yazid narrated to us, from Hajjaj, and Yazid ibn Harun said: Hajjaj informed us, from al-Rabi’ ibn Malik, who said: Khawlah bint Hakim—Muhammad ibn Yazid said: the wife of Uthman ibn Maz’un—said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "There is no Muslim who descends at a stopping place and says when he descends: 'I seek refuge in the perfect words of Allah from the evil of what He created'—and Yazid said: 'three times'—except that he will be protected from the evil of that stopping place until he departs from it."