‏اللباس والزينة‏ : Hadeeth No:5223 Anas b. Malik reported that Allaah's Messenger (sallAllaahu alayhi wa sallam) wore a silver ring on his right hand which had an Abyssinian stone in it, and he kept its stone towards the palm....

‏الطهارة : Hadeeth No:548 Abu Huraira reported: The Messenger of Allaah (sallAllaahu alayhi wa sallam) said: When a dog drinks out of a vessel belonging to any one of you, he must wash it seven times....