‏الصلاة : Hadeeth No:881 Abu Huraira said: The best rows for men are the first rows, and the worst ones the last ones, and the best rows for women are the last ones and the worst ones for them are the first ones....

‏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...