‏البيوع : Hadeeth No:3848 Abu Sa'id al-Khudri (Allaah be pleased with him) reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: Do not sell gold for gold and silver for silver weight for weight or of the same quality....

‏الحج : Hadeeth No:2734 Kalb b. Ujra (Allaah be pleased with him) reported: It was I for whom this verse was revealed (to the Prophet):" Whoever among you is sick or has an ail- ment of the head, he (may effect) a compensation by lasting or alms or a sacrifice" He said: I came to him (the Prophet) and he said: Come Dear. S...