Narrated Abu Huraira:
Allah's Apostle said, "Whoever establishes the prayers on the night of Qadr out of sincere faith and hoping to attain Allah's rewards (not to show off) then all his past sins will be forgiven."
Volume 1, Book 2, Number 34:
posted by Masjidma at Tuesday, October 25, 2005
Hadith of Prophet Muhammad (PBUH)