Malik related to me from a reliablesource of his from Yaqub ibn Abdullah al-Ashajj from Bushr ibn Saidfrom Sad ibn Abi Waqqas from Khawla bint Hakim that the Messenger ofAllah, may Allah bless him and grant him peace, said, "Whoeverdismounts to rest in a place should say, 'I seek refuge with thecomplete words of Allah from the evil of what he created,' (audhu bikalimati-llahi at-tammati min sharri ma khalaqa), and nothing willharm him until he remounts."
USC-MSA web (English) reference: Book 54, Hadith 34
Arabic reference: Book 54, Hadith 1800