Sunan Abi Dawud 1549
سنن أبي داود#1549Sahihحَدَّثَنَا مُحَمَّدُ بْنُ الْمُتَوَكِّلِ، حَدَّثَنَا الْمُعْتَمِرُ، قَالَ قَالَ أَبُو الْمُعْتَمِرِ أُرَى أَنَّ أَنَسَ بْنَ مَالِكٍ، حَدَّثَنَا أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم كَانَ يَقُولُ " اللَّهُمَّ إِنِّي أَعُوذُ بِكَ مِنْ صَلاَةٍ لاَ تَنْفَعُ " . وَذَكَرَ دُعَاءً آخَرَ .
Anas bin Malik narrated that the Prophet (ﷺ) would say:"O Allah, I seek refuge in You from a prayer that is of no benefit
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: 8:134