(168) باب السُّجُودِ عَلَى الأَنْفِ
Abu sa'I al-Khudri said:
The mark of earth was seen on the forehead and nose of the Messenger of Allah(ﷺ) who had led the people I prayer.Abu Ali said: Abu Dawud did not recite this tradition when he recited his collection(of sunan) for the fourth time.
Reference: Sunan Abi Dawud 911
In-book reference: Book 2, Hadith 522
English translation: Book 2, Hadith 911