Jami` at-Tirmidhi 27
جامع الترمذي#27SahihSalamah bin Qais narrated that :Allah's Messenger said: "When you perform Wudu then sniff water in the nose and blow it out, and when you use small stones (to remove filth) then make it odd (numbered)
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: 1:27