It was narrated that Ibn Umar said: "The Messenger of Allah (ﷺ) said: “Prayer at night is two by two, and witr is one rak'ah”"
Sahih IsnaadSahih IsnaadIsnaad SahihBook 20 · Hadith 96
سنن النسائي
It was narrated that Ibn Umar said: "The Messenger of Allah (ﷺ) said: “Prayer at night is two by two, and witr is one rak'ah”"