Jami` at-Tirmidhi 2274
جامع الترمذي#2274Da'ifحَدَّثَنَا قُتَيْبَةُ، حَدَّثَنَا ابْنُ لَهِيعَةَ، عَنْ دَرَّاجٍ، عَنْ أَبِي الْهَيْثَمِ، عَنْ أَبِي سَعِيدٍ، عَنِ النَّبِيِّ صلى الله عليه وسلم " أَصْدَقُ الرُّؤْيَا بِالأَسْحَارِ "
Abu Sa'eed narrated that the Prophet (s.a.w) said:"The most truthful of dreams are in the last hours of the night
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:
Ahmad Muhammad ShakirDaif
Al-AlbaniDaif
Zubair Ali ZaiSahih
In-book reference: 34:5