Sunan Abi Dawud 1219
سنن أبي داود#1219Sahihحَدَّثَنَا سُلَيْمَانُ بْنُ دَاوُدَ الْمَهْرِيُّ، حَدَّثَنَا ابْنُ وَهْبٍ، أَخْبَرَنِي جَابِرُ بْنُ إِسْمَاعِيلَ، عَنْ عُقَيْلٍ، بِهَذَا الْحَدِيثِ بِإِسْنَادِهِ قَالَ وَيُؤَخِّرُ الْمَغْرِبَ حَتَّى يَجْمَعَ بَيْنَهَا وَبَيْنَ الْعِشَاءِ حِينَ يَغِيبُ الشَّفَقُ .
The above mentioned tradition has also been reported by 'Uqail through a different chain of narrators. He said:He would delay the evening prayer till he combined the evening and the night prayers when the twilight disappeared
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: 4:22