من لا يحضره الفقيه, volume 1, page 23

Hadith.37 - When the Messenger of Allah (sw) intended to enter the place of ablution (lavatory), He would say: Allahumma inni a‘oodhu bika minal-rijsi an-najsi al-khabeethi al-mukhbithi ash-shaytaani ar-rajeem. Allahumma amit ‘anni al-adha wa a‘idhni min ash-shaytaani ar-rajeem "O’ Allah (swt), I seek refuge in You from the unclean, impure, evil, defiling devil, the accursed. O’ Allah (swt), remove harm from me and protect me from the accursed devil." When he would sit down to perform ablution, He would say: Allahumma adhhib ‘anni al-qadha wa al-adha wa aj‘alni mina al-mutatahhireen "O’ Allah (swt), remove from me impurities and harm, and make me among those who are purified" And when he strained to relieve himself, He would say: Allahumma kama at‘amtanihi tayyiban fi ‘afiyah fa akhrijhu minni khabeethan fi ‘afiyah "O’ Allah (swt), as You provided this to me as pure sustenance and in good health, so allow it to leave me as impurity in good health."

Translation: Bab Ul Qaim Publications — attributed by Thaqalayn·The Arabic above is the original.

Hadith.38 - Imam Ali ibn Abi Talib (as) used to say: "There is no servant (of Allah (swt)) except that there is an angel appointed to turn his head to look at his excrement, and then the angel says to him: 'O’ child of Adam, this is your provision, so consider from where you took it and to what it has turned.' It is appropriate for the servant at that moment to say: Allāhumma urzuqnī al-ḥalāla wa jannibnī al-ḥarāma ‘O’ Allah (swt), grant me lawful provision and keep me away from the unlawful.'"

Translation: Bab Ul Qaim Publications — attributed by Thaqalayn·The Arabic above is the original.

Hadith.39 - And when The Commander of the Faithful Imam Ali ibn Abi Talib (as) intended to relieve himself, He would stand at the entrance to the restroom, then turn to his right and left toward his two angels, saying: "Step aside from me, and I vow before Allah (swt) that I will not speak with my tongue until I return to you."

Translation: Bab Ul Qaim Publications — attributed by Thaqalayn·The Arabic above is the original.