Witr is not incumbent like the status of the obligatory prayers, but it is a Sunnah that the Messenger of Allah (may Allah's peace and blessings be upon him) started practicing

Explanation

The Hadīth means that performing the Witr prayer is not obligatory like the obligatory five daily prayers, but it is a Sunnah that the Messenger of Allah (may Allah's peace and blessings be upon him) established. This last part of the Hadīth stresses the fact that the Witr prayer is desirable and recommended only, and the Messenger of Allah (may Allah's peace and blessings be upon him) performed it without making it obligatory upon us.