Hadees Related to Salat (Namaz)

Ubadah ibne-Samit Radiyallahu 'anhu narrates: I heard Rasulullah Sallallahu 'alaihi wasallam saying: Five times Salat has been made mandatory by Allah 'Azza wa Jail. He who performs his Wudu well, and offers Salat at their appointed time, performing
complete Ruku', and with fear and devotion, for such there is a covenant from Allah, that He will forgive him; and the one who does not do so, no covenant for him is with Allah. If He wills, He may forgive him and if He wills, He may punish him. (Abu-Dawud)