Sunan an-Nasa'i 528
سنن النسائي#528Sahihأَخْبَرَنَا مُحَمَّدُ بْنُ قُدَامَةَ، قَالَ حَدَّثَنَا جَرِيرٌ، عَنْ رَقَبَةَ، عَنْ جَعْفَرِ بْنِ إِيَاسٍ، عَنْ حَبِيبِ بْنِ سَالِمٍ، عَنِ النُّعْمَانِ بْنِ بَشِيرٍ، قَالَ أَنَا أَعْلَمُ النَّاسِ، بِمِيقَاتِ هَذِهِ الصَّلاَةِ عِشَاءِ الآخِرَةِ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم يُصَلِّيهَا لِسُقُوطِ الْقَمَرِ لِثَالِثَةٍ .
It was narrated that An-Nu'man bin Bashir said:"I am the most knowledgeable of people about the time of the 'Isha' prayer. The Prophet (ﷺ) used to pray it when the moon set on the third night of the month
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:
In-book reference: 6:35