الصيام : Hadeeth No:2367
Ibn'Umar (Allaah be pleased with-both of them) reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: The month of Ramadan may consist of twenty-nine days. So do not fast till you have sighted it (the new moon) and do not break fast, till you have sighted it (the new moon of Shawwal),...
الصلاة : Hadeeth No:1559
A hadith like this has been narrated by Abu Huraira by another chain of transmitters....