‏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....

‏الإيمان : Hadeeth No:219 This hadith has been transmitted by Minjab b. al-Harith Tamimi with the same chain of transmitters....