At the time of the Fajr prayer the Prophet (ﷺ) asked Bilal, "Tell me of the best deed you did after
embracing Islam, for I heard your footsteps in front of me in Paradise." Bilal replied, "I did not do
anything worth mentioning except that whenever I performed ablution during the day or night, I
prayed after that ablution as much as was written for me."
Sahih al-Bukhari Book 19, Hadith 30