Expressions to Say When Entering a Lavatory and When Coming Out

6. Muhammad ibn Yahya has narrated from Muhammad ibn Ahmad from Muhammad ibn ‘Isa from Ali ibn al-Husayn ibn ‘Abd Rabbihi who has said the following: “I once asked him (the Imam), ‘Is it permissible to wear a ring with a stone of Emerald?’ He (the Imam) replied, ‘It is not harmful but during washing one’s self after using the toilet, one should remove it.’”