(205) Chapter: Witr Prayer, its Time and Ruling

'Ali (bin Abu Talib) (May Allah be pleased with him) reported:
The Witr prayer is not obligatory as the prescribed Salat (prayers), but the Messenger of Allah (ﷺ) observed it as his regular practice (Sunnah). He (ﷺ) said, "Allah is Witr (single, odd) and loves what is Witr. So perform Witr prayer. O followers of Qur'an, observe Witr (prayer)."

[At-Tirmidhi and Abu Dawud].

Commentary: "Witr'' literally means odd number. "Allah is Witr'' means He is One in Attributes and Actions and has no equal. Witr prayer is also called Witr for the reason that it is performed in one, three, five and seven Rak`ah. It is not permissible to perform it in an even number, like two, four, six, eight etc. Thus, we learn from this Hadith that Witr is not Fard and Wajib but Sunnah Mu'akkadah (compulsory). But it would not be correct to show any slackness in performing them to this reason because every Muslim should do his level best to follow the Sunnah of the Prophet (PBUH).