أَنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ لِبِلاَلٍ عِنْدَ صَلاَةِ الْفَجْرِ يَا بِلاَلُ حَدِّثْنِي بِأَرْجَى عَمَلٍ عَمِلْتَهُ فِي الإِسْلاَمِ، فَإِنِّي سَمِعْتُ دَفَّ نَعْلَيْكَ بَيْنَ يَدَىَّ فِي الْجَنَّةِ . قَالَ مَا عَمِلْتُ عَمَلاً أَرْجَى عِنْدِي أَنِّي لَمْ أَتَطَهَّرْ طُهُورًا فِي سَاعَةِ لَيْلٍ أَوْ نَهَارٍ إِلاَّ صَلَّيْتُ بِذَلِكَ الطُّهُورِ مَا كُتِبَ لِي أَنْ أُصَلِّيَ. قَالَ أَبُو عَبْدِ اللَّهِ دَفَّ نَعْلَيْكَ يَعْنِي تَحْرِيكَ.
At the time of the Fajr prayer the Prophet (ﷺ) asked Bilal, "Tell me of the best deed you did afterembracing Islam, for I heard your footsteps in front of me in Paradise." Bilal replied, "I did not doanything worth mentioning except that whenever I performed ablution during the day or night, Iprayed after that ablution as much as was written for me."