‏الصيام : Hadeeth No:2363 Ibn Umar (Allaah be pleased with both of them) reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying in connection with Ramadan: Do not fast till you see the new moon, and do not break fast till you see it; but if the weather is cloudy calculate about it....

‏الحج : Hadeeth No:3100 Qaza'ah reported: I heard Abu Sa'id al-Khudri (Allaah be pleased with him) saying: I heard four things from Allaah's Messenger (sallAllaahu alayhi wa sallam) which impressed me and captivated me (and one out of these is this), that he forbade a woman to undertake journey extending over two days but ...