Silsilat al-Ahadith al-Sahihah

It is narrated from Sayyiduna Zaid bin Arqam (may Allah be pleased with him) that the Messenger of Allah (peace and blessings of Allah be upon him) said: "Indeed, (the devil) is present in the places of purification, so when a person enters the toilet, he should recite this supplication: I seek refuge with Allah from the male and female evil jinn."