Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
ahmad-zuhd:992ʿAbdullāh from my father > ʿAbd al-Malik > Ismāʿīl > Abū al-Mutawakkil

[Machine] That Abu Huraira and his companions used to sit in the pre-dawn time when they fasted; they said, "We cleanse our sins."  

الزهد لأحمد:٩٩٢حَدَّثَنَا عَبْدُ اللَّهِ حَدَّثَنَا أَبِي حَدَّثَنَا عَبْدُ الْمَلِكِ حَدَّثَنَا إِسْمَاعِيلُ عَنْ أَبِي الْمُتَوَكِّلِ

أَنِّ أَبَا هُرَيْرَةَ وَأَصْحَابُهُ كَانُوا إِذَا صَامُوا قَعَدُوا فِي السَّحَرِ؛ قَالُوا نُطَهِّرُ سَيِّآتِنَا