428
Musnad AhmedIt was narrated from "Ata" bin Yazeed al-Junda"i that he heard Humran the freed slave of "Uthman bin "Affan (رضي الله عنه), say.
I saw Ameer al-Mu"mineen "Uthman do wudoo’; he poured water onto his hands three times, then he rinsed his nose three times and rinsed his mouth three times... and he mentioned the Hadeeth, similar to the Hadeeth of Ma"mar.
Reference: Musnad Ahmad 428
Arabic/English book : Book 4, Hadith 428
Arabic/English book : Book 4, Hadith 428