"The Messenger of Allah said: 'No ablution (is needed) unless there is an odor or a sound.'"
Sunan Ibn Majah Book 1, Hadith 249
← Previous Hadith "The Prophet was asked about doubts (concerning ablution) during prayer. He said: 'he should not leave until he hears a sound or detects an odor.'"

Sunan Ibn Majah Book 1, Hadith 248 Next Hadith → "I saw Sa'ib bin Yazid sniffing his garment, and I said: 'Why (are you doing) that?' He said: 'I heard the Messenger of Allah say: "No ablution (is needed) unless there is an odor or a sound."

Sunan Ibn Majah Book 1, Hadith 250