1146/1 - Abu Hurayrah (may Allah be pleased with him) reported that the Messenger of Allah (may Allah’s peace and blessings be upon him) said to Bilāl: “O Bilāl, tell me of the most rewarding deed you have done since your acceptance of Islam, as I heard the scuffle of your sandals in front of me in Paradise.” Bilāl said: “I do not consider any deed that I have done more rewarding than that whenever I make ablution in any time of night or day, I immediately perform prayer, for as long as was destined for me to perform.” [Narrated by Al-Bukhāri and Muslim] This is the wording of Al-Bukhāri.
Scuffle: the sound of the sandals as they scrape the ground.
1) Righteous deeds done sincerely for the sake of Allah Almighty lead to Paradise.
2) It is recommended to be keen on performing two Rak‘ahs after ablution. Indeed, persistent performance of good deeds is a reason for entering Paradise.
3) It points out the special merit of the Companion Bilāl (may Allah be pleased with him), as he was one of those given glad tidings of entry into Paradise.