'Alibin Abu Talib said:
"Witr is not definite (obligatory) nor is itlike your prescribed prayers. But the Messenger of Allah (ﷺ) prayedWitr, then he said: 'O people of the Qur'an! Perform Witr, forAllahis Witr* and He loves the odd (numbered).'" (TR)
English reference (TR): Vol. 1, Book 5, Hadith 1169 (TR)
Arabic reference (TR): Book 5, Hadith 1224 (TR)