Invocation for entering the restroom (Toilet)

"[بِسْمِ اللهِ] اللَّهُمَّ إِنِّي أَعُوذُ بِكَ مِنَ الْخُبُْثِ وَالْخَبَائِثِ".

10. [bismillaahi] allaahumma 'innee 'a'oothu bika minal-khubthi walkhabaa'ith.

(before entering) [in the name of allah] . (then) o allah , i seek protection in you from the male and female unclean spirits.

reference: al-bukhari 1/45, muslim 1/283. the addition of bismillah at its beginning was reported by said bin mansur. see fathul-bari 1/244