It was narrated from Ibn 'Abbas that:The Messenger of Allah rinsed his mouth and sniffed water up into his nostrils from one scoop of water
Hadith No. 403
Sunan Ibn Majah
Gradings:
Al-Albani:
Sahih
Muhammad Fouad Abd al-Baqi:
Sahih
Shuaib Al Arnaut:
Sahih
Zubair Ali Zai:
Sahih Bukhari