Twelve Rakat

Umm Habibah bint Abu Sufyan (radhiAllaahu 'anha) narrated that the Messenger of Allaah, sallAllaahu 'alayhi wa sallam, said, 

"Whoever prays twelve rakat during the day and night will have a house built for him in Paradise: four rakat before Dhuhr and two after it, two rakat after Maghrib, two rakat after 'Isha, and two rakat before Fajr." 

[Tirmidhi]