The Book of Purification
1/72. Chapter:
The Command To Blow (Water From The Nose)
Sunan an-Nasai
أَخْبَرَنَا قُتَيْبَةُ، عَنْ مَالِكٍ، ح وَحَدَّثَنَا إِسْحَاقُ بْنُ مَنْصُورٍ، قَالَ حَدَّثَنَا عَبْدُ الرَّحْمَنِ، عَنْ مَالِكٍ، عَنِ ابْنِ شِهَابٍ، عَنْ أَبِي إِدْرِيسَ الْخَوْلاَنِيِّ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " مَنْ تَوَضَّأَ فَلْيَسْتَنْثِرْ وَمَنِ اسْتَجْمَرَ فَلْيُوتِرْ " .
It was narrated from Abu Hurairah that the Messenger of Allah (ﷺ) said: "Whoever performs Wudu' then let him sniff water in the nose and blow it out, and whoever uses small stones (to remove filth) then make it odd (numbered)."
Reference : Sunan an-Nasa'i 88In-book reference : Book 1, Hadith 88English translation : Vol. 1, Book 1, Hadith 88