عَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ عَنِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ أَنَّهُ كَانَ إِذَا اسْتَنْشَقَ أَدْخَلَ الْمَاءَ مَنْخِرَيْهِ
It is narrated from Sayyiduna Abu Hurairah, may Allah be pleased with him, that when the Noble Prophet, peace and blessings be upon him, performed istinshaq, he would let water enter his nostrils.