Sunan Abi Dawud 1436
سنن أبي داود#1436Sahihحَدَّثَنَا هَارُونُ بْنُ مَعْرُوفٍ، حَدَّثَنَا ابْنُ أَبِي زَائِدَةَ، قَالَ حَدَّثَنِي عُبَيْدُ اللَّهِ بْنُ عُمَرَ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، أَنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ " بَادِرُوا الصُّبْحَ بِالْوِتْرِ " .
Ibn 'Umar reported the Prophet (ﷺ) as saying:Make haste to observe the witr prayer before morning
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Shuaib Al ArnautSahih
Zubair Ali ZaiIsnaad Sahih
In-book reference: 8:21