Oneness, Uniqueness of Allah (Tawheed)

Bukhari :: Book 9 :: Volume 93 :: Hadith 587

Narrated Abu Huraira:

Allah's Apostle said, "We (Muslims) are the last (to come) but will be the foremost on the Day of Resurrection." The narrators of this Hadith said: Allah said (to man), 'Spend (in charity), for then I will compensate you (generously).' "