ßÊÇÈ ÇáÇÚÊÕÇã ÈÇáßÊÇÈ æÇáÓäÉ : Hadeeth No:6823 : Anas: We were with 'Umar and he said, "We have been forbidden to undertake a difficult task beyond our capability (i.e. to exceed the religious limits e.g., to clean the inside of the eyes while doing ablution)."...

ßÊÇÈ ÕÝÉ ÇáÕáÇÉ : Hadeeth No:758 : Zaid binWahb: Hudhaifa saw a person who was not performing the bowing and prostrations perfectly. He said to him, "You have not prayed and if you should die you would die on a religion other than that of Muhammad." ...