‏الزهد والرقائق‏ : Hadeeth No:7120 Abu Huraira reported that he heard Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: The servant speaks words for which he is sent down to the Hell-Fire farther than the distance between the cast and the west....

‏الذكر والدعاء والتوبة والاستغفار‏ : Hadeeth No:6477 Anas reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: When one of you makes supplication, he should supplicate with a will and should not say: O Allaah, confer upon me if Thou likest, for there is none to coerce Allaah....