‏البيوع : Hadeeth No:3732 Abu Sa'id al-Khudri (Allaah be pleased with him) reported Allaah's Messenger (sallAllaahu alayhi wa sallam) having forbidden Mazabana and Muhaqala. Muzibana means the buying of fruits on the trees and Muhaqala is the renting of land....

‏النكاح : Hadeeth No:3409 Ibn Abbas (Allaah be pleased with them) reported: It was proposed that he (the Prophet) be married to the daughter of Hamza, whereupon he said: She is not lawful for me for she is the daughter of my foster-brother, and that is unlawful by reason of fosterage what is unlawful by reason of genealogy....