Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
nasai-kubra:93Qutaybah b. Saʿīd > ʿAbd al-ʿAzīz > Zayd b. Aslam > ʿAṭāʾ b. Yasār > Ibn ʿAbbās

[Machine] The Messenger of Allah, ﷺ , performed ablution, then he put his hand into the vessel and sniffed water into his nose and gargled once.  

الكبرى للنسائي:٩٣أَخْبَرَنَا قُتَيْبَةُ بْنُ سَعِيدٍ قَالَ حَدَّثَنَا عَبْدُ الْعَزِيزِ عَنْ زَيْدِ بْنِ أَسْلَمَ عَنْ عَطَاءِ بْنِ يَسَارٍ عَنِ ابْنِ عَبَّاسٍ قَالَ

«تَوَضَّأَ رَسُولُ اللهِ ﷺ فَأَدْخَلَ يَدَهُ فِي الْإِنَاءِ فَاسْتَنْشَقَ وَمَضْمَضَ مَرَّةً وَاحِدَةً»