‏النكاح : Hadeeth No:3294 'Uqba b. 'Amir said on the pulpit that Allaah's Messenger (sallAllaahu alayhi wa sallam) said: A believer is the brother of a believer, so it is not lawful for a believer to outbid his brother, and he should not propose an engagement when his brother has thus proposed until he gives it up....

‏الأضاحي : Hadeeth No:4823 Al-Bara' reported: My maternal uncle Abu Burda sacrificed his animal before ('Id) prayer. Thereupon Allaah's Messenger (sallAllaahu alayhi wa sallam) said: That is a goat (slaughtered for the sake of) flesh (and not as a sacrifice on the day of Adha). He said: I have a lamb of six months. Thereupon ...