‏العلم : Hadeeth No:6460 Abu Huraira reported Allaah's Messenger (sallAllaahu alayhi wa sallam) having said: The time would draw close to the Last Hour and knowledge would decrease. The rest of the hadith is the same....

‏الفضائل : Hadeeth No:5796 Anas b. Malik reported that Allaah's Messenger (sallAllaahu alayhi wa sallam) died when he was sixty-three years old, and so was the case with Abu Bakr, and so was the case with Umar who was also sixty-three (when he died)....