Du'a before entering the restroom

اللَّهُمَّ إِنِّي أَعُوذُ بِكَ مِنَ الْخُبْثِ وَالْخَبَائِثِ

Allahumma inni a'udhu bika minal-khubthi wal-khaba'ith

O Allah, I seek Your protection from the male and female devils.

Ṣaḥīḥ al-Bukhārī 142