The enduring good deeds.
The reward for performing many voluntary prayers.
On the authority of Abu Hurayrah, may Allah be pleased with him,
that the Prophet, peace and blessings of Allah be upon him, said to Bilal:
"O Bilal,
tell me about the deed you have done in Islam that you are most hopeful about,
for I heard the sound of your footsteps in front of me in Paradise."
He replied:
"I have not performed any deed I am more hopeful about than this:
that I have never performed ablution at any hour of the night or day
without praying with that ablution whatever was decreed for me to pray."
Narrated by al-Bukhari.