Going to extremes in sniffing water up into the nostrils and blowing it out
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا يَحْيَى بْنُ سُلَيْمٍ الطَّائِفِيُّ، عَنْ إِسْمَاعِيلَ بْنِ كَثِيرٍ، عَنْ عَاصِمِ بْنِ لَقِيطِ بْنِ صَبِرَةَ، عَنْ أَبِيهِ، قَالَ قُلْتُ يَا رَسُولَ اللَّهِ أَخْبِرْنِي عَنِ الْوُضُوءِ، . قَالَ " أَسْبِغِ الْوُضُوءَ وَبَالِغْ فِي الاِسْتِنْشَاقِ إِلاَّ أَنْ تَكُونَ صَائِمًا " .
It was narrated from 'Asim bin Laqit bin Sabrah that his father said: "I said: 'O Messenger of Allah! Tell me about ablution.' He said: 'Perform ablution properly and sniff water up into your nostrils, thoroughly, unless you are fasting.'"