a man from Madinah told me that the muʿadhdhin gave the call to ʿAsr prayer and ‘Uthman ؓ called for water and purified himself, then he said: I heard the Messenger of Allah ﷺ say: ʿWhoever purifies himself as he has been enjoined and prays as he has been enjoined, his sins will be expiated.” Then he called four of the Companions of the Messenger of Allah ﷺ to testify to that, and they testified that the Prophet ﷺ had said that.
سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ مَنْ تَطَهَّرَ كَمَا أُمِرَ وَصَلَّى كَمَا أُمِرَ كُفِّرَتْ عَنْهُ ذُنُوبُهُ فَاسْتَشْهَدَ عَلَى ذَلِكَ أَرْبَعَةً مِنْ أَصْحَابِ رَسُولِ اللهِ ﷺ قَالَ فَشَهِدُوا لَهُ بِذَلِكَ عَلَى النَّبِيِّ ﷺ