ENOfficial
It was narrated that Anas bin Malik said: "Whenever the Messenger of Allah (ﷺ) entered the toilet, he would say: 'A'udhu Billahi minal-khubthi wa'l-khaba'ith (I seek refuge with Allah from male and female devils).'"
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا عَمْرُو بْنُ رَافِعٍ، حَدَّثَنَا إِسْمَاعِيلُ ابْنُ عُلَيَّةَ، عَنْ عَبْدِ الْعَزِيزِ بْنِ صُهَيْبٍ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ كَانَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ إِذَا دَخَلَ الْخَلاَءَ قَالَ " أَعُوذُ بِاللَّهِ مِنَ الْخُبُثِ وَالْخَبَائِثِ " .
sunnah.com