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.
nasai-kubra:9853Ibrāhīm b. Yaʿqūb > ʿAbdullāh b. al-Rabīʿ Khurāsānī Bi-al-Maṣṣīṣah > ʿAbbād b. al-ʿAwwām > Ḥuṣayn > Hilāl b. Yasāf > Zādhān > a man from al-Anṣār Nasī Āsmah

[Machine] He saw the Prophet ﷺ praying the two rak'ahs of Duha, and when he sat down, I heard him say, "O Lord, forgive me and accept my repentance. Indeed, You are the Oft-Returning, the Most Merciful" repeatedly until it reached one hundred times.  

الكبرى للنسائي:٩٨٥٣أَخْبَرَنِي إِبْرَاهِيمُ بْنُ يَعْقُوبَ قَالَ حَدَّثَنِي عَبْدُ اللهِ بْنُ الرَّبِيعِ خُرَاسَانِيٌّ بِالْمَصِّيصَةِ قَالَ حَدَّثَنَا عَبَّادُ بْنُ الْعَوَّامِ عَنْ حُصَينٍ عَنْ هِلَالِ بْنِ يَسَافٍ عَنْ زَاذَانَ عَنْ رَجُلٍ مِنَ الْأَنْصَارِ نَسِيَ اسْمَهُ

أَنَّهُ رَأَى النَّبِيَّ ﷺ صَلَّى رَكْعَتَيِ الضُّحَى فَلَمَّا جَلَسَ سَمِعْتُهُ يَقُولُ «رَبِّ اعْفِرْ لِي وَتُبْ عَلَيَّ إِنَّكَ أَنْتَ التَّوَّابُ الرَّحِيمُ» حَتَّى بَلَغَ مِائَةَ مَرَّةٍ