‏الصيام : Hadeeth No:2391 Kuraib reported that Umm Fadl, daughter of Harith, sent him (Fadl, i. e. her son) to Mu'awiya in Syria. I (Fadl) arrived in Syria, and did the needful for her. It was there in Syria that the month of Ramadan commenced. I saw the new moon (of Ramadan) on Friday. I then came back to Medina at the end ...

‏الصلاة : Hadeeth No:1805 Abu Sa'id al-Khudri reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: No prayer is valid after the 'Asr prayer till the sun sets and no prayer is valid after the dawn prayer till the sun rises....