‏النكاح : Hadeeth No:3292 Abu Huraira (Allaah be pleased with him) reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: The Muslim should not purchase in opposition to his brother, and he should not make the proposal of marriage on the proposal already made by his brother....

‏الحج : Hadeeth No:3022 Ali b. Abi Talib (Allaah be pleased with him) reported: Allaah's Prophet (sallAllaahu alayhi wa sallam) put him in charge of his sacrificial animals, and commanded him to distribute the whole of their meat, hides, and saddle cloths to the poor, and not to give to the butcher anything out of them....