‘A’isha said that God’s Messenger used to observe a witr with one rak'a, then he performed two rak'as reciting the Qur’an in the course of them seated. When he wished to bow, he stood up and bowed. Ibn Majah transmitted it.
Hadith Referenceمشكوة المصابيح / كتاب الصلاة / 1285
Hadith Gradingالألبانی:صَحِيحٌ | زبیر علی زئی:صحيح
Hadith Takhrij´تحقيق و تخريج: محدث العصر حافظ زبير على زئي رحمه الله` «صحيح، رواه ابن ماجه (1196) [و مسلم: 738/126]»