'Uqba Ibne-'Amir Juhani Radiyallahu 'anhu narrates that Rasulullah Sallallahu 'alaihi wasallam said: Anyone who performs Wudu and performs Wudu perfectly and then offers two Rak'at, fully concentrating with his heart and keeping his face and body relaxed, then Paradise becomes due for him (Abu Dawud: 906)