The Prophet ﷺ said, "Hasten to perform the witr prayer before dawn."
أن النبي الله ﷺ قال: بادروا الصبح بالوتر.
No references are available.
Muslim narrated it in "Prayer of the Traveler" (750), via Ibn Abu Zaida, who said, "Aasim Ahwal told me," from Abdullah bin Shaqiq, from Ibn Umar, and he mentioned it.