The famous hadith of the wudu of Uthman ᴿᴬ

that he saw Uthman b. Affan asking ˹for a tumbler of water˺ to perform ablution. (1) He poured water from it over his hands, and (2) washed them thrice, and then (3) put his right hand in the water container, and (4) rinsed his mouth, and (5) washed his nose by putting water in it, and then blowing it out. Then (6) he washed his face thrice and (7) forearms up to the elbows thrice, then (8) passed his ˹wet˺ hands over his head, and then (9) washed each foot thrice.

After that Uthman said, "I saw the Prophet ﷺ performing ablution like this of mine, and he said, 'If anyone performs ablution like that of mine and offers a two-rakah prayer during which he does not speak (or does not think of anything else or does not break his wudu or does not innovate) then his past sins will be forgiven.'"  

أَنَّهُ رَأَى عُثْمَانَ دَعَا بِوَضُوءٍ (١) فَأَفْرَغَ عَلَى يَدَيْهِ مِنْ إِنَائِهِ، (٢) فَغَسَلَهُمَا ثَلاَثَ مَرَّاتٍ، ثُمَّ (٣) أَدْخَلَ يَمِينَهُ فِي الْوَضُوءِ، ثُمَّ (٤) تَمَضْمَضَ، (٥) وَاسْتَنْشَقَ وَاسْتَنْثَرَ، ثُمَّ (٦) غَسَلَ وَجْهَهُ ثَلاَثًا، (٧) وَيَدَيْهِ إِلَى الْمِرْفَقَيْنِ ثَلاَثًا، ثُمَّ (٨) مَسَحَ بِرَأْسِهِ، ثُمَّ (٩) غَسَلَ كُلَّ رِجْلٍ ثَلاَثًا۔

ثُمَّ قَالَ رَأَيْتُ النَّبِيَّ ﷺ يَتَوَضَّأُ نَحْوَ وُضُوئِي هَذَا وَقَالَ «مَنْ تَوَضَّأَ نَحْوَ وُضُوئِي هَذَا ثُمَّ صَلَّى رَكْعَتَيْنِ لاَ يُحَدِّثُ فِيهِمَا نَفْسَهُ غَفَرَ اللَّهُ لَهُ مَا تَقَدَّمَ مِنْ ذَنْبِهِ۔»