‏فضائل الصحابة‏ : Hadeeth No:5877 Ibn Abu Mulaika reported: I heard A'isha as saying and she was asked as to whom Allaah's Messenger (sallAllaahu alayhi wa sallam) would have nominated his successor if he had to nominate one at all. She said: Abu Bakr. It was said to her: Then whom after Abu Bakr? She said: Umar. It was said to her....

‏الصيام : Hadeeth No:2523 Abu Musa reported that the people of Khaibar (most of them were Jews) observed fast on tht day of 'Ashura and they treated it as 'Id and gave their women ornaments and beautiful dresstowear. The Messenger of Allaah (sallAllaahu alayhi wa sallam) said: You (only) observe fast on this day....