"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."
سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ لاَ وُضُوءَ إِلاَّ مِنْ رِيحٍ أَوْ سَمَاعٍ