Jami` at-Tirmidhi 74
جامع الترمذي#74SahihAbu Hurairah narrated that :Allah's Messenger said: "There no Wudu except for a sound or a smell
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirSahih
Al-AlbaniSahih
Bashar Awad MaaroufHasan Sahih
Zubair Ali ZaiIsnaad Sahih
In-book reference: 1:74