"When any one of you performs Wudu', let him put water in his nose then blow it out."  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ إِذَا تَوَضَّأَ أَحَدُكُمْ فَلْيَجْعَلْ فِي أَنْفِهِ مَاءً ثُمَّ لْيَسْتَنْثِرْ