It wasnarrated that 'Aishah said:
"The Messenger of Allah (ﷺ) usedtosay Taslim after every two Rak'ah, and he would perform Witr withone Rak'ah." (RU)
English reference (RU): Vol. 1, Book 5, Hadith 1177 (RU)
Arabic reference (RU): Book 5, Hadith 1233 (RU)