It is narrated from a man of the Aslam tribe that one night I could not sleep, so the Messenger of Allah, peace be upon him, said: "For what reason?" He said: I was bitten by a bed creature. So the Messenger of Allah, peace be upon him, said: "If you had recited in the evening «أَعُوذُ بِكَلِمَاتِ اللَّهِ التَّامَّاتِ مِنْ شَرِّ مَا خَلَقَ» 'I seek refuge in the perfect words of Allah from the evil of what He has created,' then, insha'Allah, nothing would have harmed you."