‏اللباس والزينة‏ : Hadeeth No:5165 Abu Umama reported Allaah's Messenger (sallAllaahu alayhi wa sallam) having said: He who wore silk in this world would not wear it in the Hereafter....

‏الصلاة : Hadeeth No:2122 Abu Marthad al-Ghanawi reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: Do not pray facing towards the graves, and do not sit on them....