Prophet (SAW)'s Prayers When entering the toilet

When entering the toilet recite:

Bismillah "In the name of Allah"

It is in the hadith that between the eyes of Satan and the private parts of man Bismillah is a barrier therefore, this dua should be recited.

اللُّهُمَّ إِنِّي أَعُوذُ بِكَ مِنَ الْخُبْثِ وَالْخَبَائِثِ

"O Allah. I seek refuge in You from the male female evil and Jinns". (Mishkat, Hisnul Hasin)