Before entering the toilet
When entering the toilet recite:
بِسْمِ اللَّهِ
I begin 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)
Source/By :
Fortification of the Muslims through remembrance and supplication from the Quran and the Sunnah