‏اللباس والزينة‏ : Hadeeth No:5164 Anas reported that Allaah's Messenger (sallAllaahu alayhi wa sallam) said: He who wore silk in this world would not wear it in the Hereafter....

‏الصلاة : Hadeeth No:1445 Khufaf b. Ima' al-Ghifari reported that the Messenger of Allaah (sallAllaahu alayhi wa sallam) aid in prayer: 0 Allaah I curse the tribes of Lihyan, Ri'l, Dhakwan, and 'Usayya for they disobeyed Allaah and His Messenger (sallAllaahu alayhi wa sallam). Allaah pardoned (the tribe of) Ghifar and Allaah...