I came to ‘Uthman bin ʿAffan ؓ when he was sitting in al-Maqaʿid. He did wudoo and did it well, then he said: I saw the Messenger of Allah ﷺ when he was in this place; he did wudoo’ and did it well, then he said: “Whoever does wudoo’ as I have done, then goes to the mosque and prays two rakats, his previous sins will be forgiven.” And he said: The Messenger of Allah ﷺ said: ʿDo not become complacent.” (Using translation from Aḥmad 459)   

رَأَيْتُ رَسُولَ اللهِ ﷺ تَوَضَّأَ فَأَحْسَنَ الْوُضُوءَ ثُمَّ قَالَ «مَنْ تَوَضَّأَ مِثْلَ هَذَا الْوُضُوءِ ثُمَّ أَتَى الْمَسْجِدَ فَرَكَعَ فِيهِ رَكْعَتَيْنِ غُفِرَ لَهُ مَا تَقَدَّمَ مِنْ ذَنْبِهِ»  

I saw ‘ Uthman’ b. ‘Affan while he performed ablution. He poured water over his hands three times and then washed them. He then rinsed his mouth and then cleansed his nose with water (three times). He then washed his right arm up to the elbow three times, then washed his left arm in a similar manner; then wiped his head; then washed his right foot three times, then washed his left foot in a similar manner, and then said : I saw the Messenger of Allah ﷺ performing ablution like this ablution of mine. Then he (the Prophet) said: He who performs ablution like this ablution of mine and then offered two rakhahs of prayer without allowing his thoughts to be distracted, Allah will pardon all his past sins. (Using translation from Abū Dāʾūd 106)   

رَأَيْتُ رَسُولَ اللهِ ﷺ تَوَضَّأَ مِثْلَ وُضُوئِي هَذَا ثُمَّ قَالَ رَسُولُ اللهِ ﷺ «مَنْ تَوَضَّأَ مِثْلَ وُضُوئِي هَذَا ثُمَّ قَامَ فَصَلَّى رَكْعَتَيْنِ غُفِرَ لَهُ مَا تَقَدَّمَ مِنْ ذَنْبِهِ»  

"I said: 'O Messenger of Allah! How is Wudu' done?' He said: 'As for Wudu', when you perform Wudu', and you wash your hands to clean them, your sins come out from between your fingers and fingertips. When you rinse your mouth and nostrils, and wash your face and hands up to the elbows, and wipe your head, and wash your feet up to the ankles, you are cleansed of all your sins. When you prostrate your face to Allah, may He be exalted, you emerge from your sins like the day your mother bore you.'" Abu Umamah said: "I said: 'O 'Amr bin 'Abasah! Look at what you are saying! Was all of that given in one sitting? He said: 'By Allah, I have grown old, my appointed time is near and I am not so poor that I should tell lies about the Messenger of Allah ﷺ. I heard it with my own ears and understood it in my heart from the Messenger of Allah.'" (Using translation from Nasāʾī 147)   

سَمِعْتُ عَمْرُو بْنُ عَبَسَةَ يَقُولُ قُلْتُ يَا رَسُولَ اللهِ كَيْفَ الْوُضُوءُ؟ قَالَ «أَمَّا الْوُضُوءُ فَإِنَّكَ إِذَا تَوَضَّأْتَ فَغَسَلْتَ كَفَّيْكَ فَأَنْقَيْتَهُمَا خَرَجَتْ خَطَايَاكَ مِنْ بَيْنِ أَظْفَارِكَ وَأَنَامِلِكَ فَإِذَا مَضْمَضْتَ وَاسْتَنْشَقْتَ مَنْخَرَيْكَ وَغَسَلْتَ وَجْهَكَ وَيَدَيْكَ إِلَى الْمِرْفَقَيْنِ وَمَسَحْتَ بِرَأْسِكَ وَغَسَلْتَ رِجْلَيْكَ إِلَى الْكَعْبَيْنِ اغْتَسَلْتَ مِنْ عَامَّةِ خَطَايَاكَ فَإِنْ أَنْتَ وَضَعْتَ وَجْهَكَ لِلَّهِ خَرَجْتَ مِنْ خَطَايَاكَ كَيَوْمِ وَلَدَتْكَ أُمُّكَ»