‏البيوع : Hadeeth No:3693 Ibn Umar (Allaah be pleased them) reported Allaah's Messenger (sallAllaahu alayhi wa sallam) having forbidden Muzabana, and Muzabana implies the selling of fresh dates for dry dates by measuring them out and the selling of raisins by measure for grapes....

‏الحج : Hadeeth No:3074 Salim b. Abdullah reported his father (Allaah be pleased with him) saying: I saw Allaah's Messenger (sallAllaahu alayhi wa sallam) entering the Ka'ba, and Usama b. Zaid, Bilal and 'Uthman b. Talha were along with him, but none (else) entered therein along with them. Then the door was closed for them...