‏الآداب : Hadeeth No:5362 This hadith has been narrated on the authority of Talha b. Yahya with the same chain of transmitters but with this variation of wording: He (Hadrat 'Umar) said: Abu Mundhir (the Kunya of Ubayy b. Ka'b), did you hear this from Allaah's Messenger (sallAllaahu alayhi wa sallam)? Thereupon he said: Yes....

‏الصيام : Hadeeth No:2529 Abdullah b 'Abbas reported that the Messenger of Allaah (sallAllaahu alayhi wa sallam) had said: If I live till the next (year), I would definitely observe fast on the 9th, and the narration transmitted by Abu Bakr is:" He meant the day of Ashura."...