Hadiths 1.35, 1.36 and 1.37

1.35:
Narrated Abu Huraira: The Prophet said, "The person who
participates in (Holy battles) in Allah's cause and nothing
compels him to do so except belief in Allah and His Apostles,
will be recompensed by Allah either with a reward, or booty
(if he survives) or will be admitted to Paradise (if he is
killed in the battle as a martyr). Had I not found it
difficult for my followers, then I would not remain behind any
sariya (military unit) going for Jihad and I would have loved
to be martyred in Allah's cause and then made Alive, and then
martyred and then made alive, and then again martyred in His
cause."

1.36:
Narrated Abu Huraira: Allah's Apostle said: "Whoever
establishes prayers during the nights of Ramadan faithfully
out of sincere faith and hoping to attain Allah's rewards (not
for showing off), all his past sins will be forgiven."

1.37:
Narrated Abu Huraira: Allah's Apostle said, "Whoever observes
fasts during the month of Ramadan out of sincere faith, and
hoping to attain Allah's rewards, then all his past sins will
be forgiven."