(3) باب مَا يَقُولُ الرَّجُلُ إِذَا دَخَلَ الْخَلاَءَ
Narrated Zayd ibn Arqam:
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."
Reference: Sunan Abi Dawud 6
In-book reference: Book 1, Hadith 6
English translation: Book 1, Hadith 6