Three gates of go0dness.

Prophet Muhammad (pbuh) said,
"There are three gates of go0dness.
The first is fasting which is a shield from the Hell Fire.
Second is Sadaqa, i.e. Charity. That Charity which extinguishes
sin same as water extinguishes fire. And the third is standing
in prayer in the late h0urs in the night"
[Tirmidhi, Book of Faith, Hadith N0. 2616]