It was narrated from ‘Asim bin Laqit bin Sabirah that his father said: “I said: ‘Messenger of Allah صلی اللہ علیہ وآلہ وسلم, tell me about Wudu.” He said: ‘Perform Wudu’ well, and exaggerate in sniffing water up into your nose, except when you are fasting.” (Sahih)