It is narrated from Sayyidah Umm Habibah (may Allah be pleased with her) that the Messenger of Allah (peace and blessings be upon him) said: "Whoever prays twelve rak'ahs in a day, Allah will build for him a house in Paradise: four rak'ahs before Zuhr, two rak'ahs after Zuhr, two rak'ahs before Asr, two rak'ahs after Maghrib, and two rak'ahs after Isha."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 19742