Is the following Hadith authentically attributed to the Messenger of Allah, peace and blessings be upon him: "No one consistently observes the Witr prayer except a believer"?

The exact wording "Witr is a duty upon every Muslim" was not explicitly mentioned, but a Hadith from Abu Ayyub al-Ansari states: "Witr is a duty upon every Muslim" (narrated by Abu Dawud and authenticated by Al-Albani). There is another weak Hadith with the wording: "Witr is a duty, and whoever does not perform Witr is not one of us." Witr is considered the most emphasized Sunnah by the majority of scholars, and some have even deemed it obligatory. Whoever intentionally neglects it out of negligence is considered a transgressor (fasiq) whose testimony is not accepted, based on the Prophet's (PBUH) saying: "Whoever turns away from my Sunnah is not from me."