He called for water for ablution, then rinsed his mouth and inhaled water into his nose and blew it out with his left hand. He did this three times and then said, "This is the purification of the Prophet of Allah ﷺ."  

أَنَّهُ دَعَا بِوَضُوءٍ فَتَمَضْمَضَ وَاسْتَنْشَقَ وَنَثَرَ بِيَدِهِ الْيُسْرَى فَفَعَلَ هَذَا ثَلاَثًا ثُمَّ قَالَ هَذَا طُهُورُ نَبِيِّ اللَّهِ ﷺ