‏الآداب : Hadeeth No:5355 This hadith has been narrated on the authority of Yazid b. Khusaifa with the same chain of transmitters but with this addition: Abu Sa'id said: So I stood up, and went to 'Umar and gave witness (to what Abu Musa had said)....

‏الصلاة : Hadeeth No:1642 Ibn Umar reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: Witr is a rak'ah at the end of the night prayer....