Abu Dawud Book 2, Hadith Number 1412.
Chapter : To observe the witr is commendable.
Narated By N/A : The above-mentioned tradition has also been narrated by ‘Abd Allah (b. Masud) through a different chain of narrators to the same effect. This version adds: A beduin said: What are you saying? He replied: This is neither for you, nor for your companions.