The Messenger of Allah ﷺ said: These privies are frequented by the jinns and devils. So when anyone amongst you goes there, he should say: "I seek refuge in Allah from male and female devils." (Using translation from Abū Dāʾūd 6)
قَالَ رَسُولُ اللهِ ﷺ إنَّ هَذِهِ الْحُشُوشَ مُحْتَضَرَةٌ فَإِذَا دَخَلَ أَحَدُكُمُ الْخَلَاءَ فَلْيَقُلْ أَعُوذُ بِاللهِ مِنَ الْخُبُثِ وَالْخَبَائِثِ