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.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
suyuti:21203a –
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السيوطي:٢١٢٠٣a –

"مَنْ تَوَضَّأَ كمَا أُمِرَ، وَصَلَّى كَمَا أُمِرَ، خَرج مِنْ ذُنُوبِه كَيَوْمِ وَلَدَتْهُ أُمُّهُ".  

[طب] الطبرانى في الكبير عن عثمان بن عفان

See similar narrations below:

Collected by Ṭabarānī
tabarani:149 – ʿAbdullāh b. Aḥmad b. Ḥanbal And Muḥammad b. ʿAbdullāh al-Ḥaḍramī > Zakariyyā b. Yaḥyá Zaḥmawayh > Ziyād b. ʿAbdullāh > Muḥammad b. Sūqah > ʿAmr b. Maymūn > ʿUthmān

[Machine] I heard 'Uthman, and he used to speak very little about the Messenger of Allah ﷺ . He said: I heard the Messenger of Allah ﷺ say: "Whoever performs ablution as commanded and prays as commanded, will have his sins removed as if he were born anew."  

الطبراني:١٤٩ – حَدَّثَنَا عَبْدُ اللهِ بْنُ أَحْمَدَ بْنِ حَنْبَلٍ وَمُحَمَّدُ بْنُ عَبْدِ اللهِ الْحَضْرَمِيُّ قَالَا ثنا زَكَرِيَّا بْنُ يَحْيَى زَحْمَوَيْهِ ثنا زِيَادُ بْنُ عَبْدِ اللهِ ثنا مُحَمَّدُ بْنُ سُوقَةَ عَنْ عَمْرِو بْنِ مَيْمُونٍ قَالَ

سَمِعْتُ عُثْمَانَ ؓ وَكَانَ قَلِيلَ الْحَدِيثِ عَنْ رَسُولِ اللهِ ﷺ قَالَ سَمِعْتُ رَسُولَ اللهِ ﷺ «مَنْ تَوَضَّأَ كَمَا أُمِرَ وَصَلَّى كَمَا أُمِرَ خَرَجَ مِنْ ذُنُوبِهِ كَمَا وَلَدَتْهُ أُمُّهُ»