Sahih Muslim
The Book of Prayers (Kitab Al-Salat)
Book Number: 004 / Hadith Number: 1412
Ata' b. Yasar reported, on the authority of Abu Huraira, the Apostle of Allah (may peace be upon him) as saying: He who went towards the mosque in the morning or evening, Allah would arrange a feast for him morning or evening in Paradise.