‏الصيام : Hadeeth No:2382 Abu Huraira (Allaah be pleased with him) reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: Do not observe fast for a day, or two days ahead of Ramadan except a person who is in the habit of observing a particular fast; he may fast on that day....

‏الجهاد والسير‏ : Hadeeth No:4410 This tradition has been narrated through a different chain of transmitters....