Sunan Abi Dawud 1386
سنن أبي داود#1386Sahihحَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ مُعَاذٍ، حَدَّثَنَا أَبِي، أَخْبَرَنَا شُعْبَةُ، عَنْ قَتَادَةَ، أَنَّهُ سَمِعَ مُطَرِّفًا، عَنْ مُعَاوِيَةَ بْنِ أَبِي سُفْيَانَ، عَنِ النَّبِيِّ صلى الله عليه وسلم فِي لَيْلَةِ الْقَدْرِ قَالَ " لَيْلَةُ الْقَدْرِ لَيْلَةُ سَبْعٍ وَعِشْرِينَ " .
Narrated Mu'awiyah b. Abi Sufyan :The Prophet (ﷺ) as saying: Lailat al-qadr is the twenty-seventh night (of Ramadan)
Scholarly Authentication
The label above is the grade most of these scholars gave, each scholar counted once — 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. When they judged only its chain of narrators (“Isnaad”), the label says “Sound chain”. Each scholar's own wording:
Our source also lists this ruling under Muhammad Muhyi Al-Din Abdul Hamid, the editor of the printed edition it was taken from. It is al-Albani's ruling printed again, so it is counted once.
In-book reference: 6:16