Jami at-Tirmidhi 2274
Jami at-Tirmidhi · Book 34: Chapters On Dreams · Allah's Saying "For Them Are Glad Tidings In The Life Of The Present World."
'Abu Sa'eed narrated that the Prophet (s.a.w) said:
حَدَّثَنَا قُتَيْبَةُ ، حَدَّثَنَا ابْنُ لَهِيعَةَ ، عَنْ دَرَّاجٍ ، عَنْ أَبِي الْهَيْثَمِ ، عَنْ أَبِي سَعِيدٍ ، عَنِ النَّبِيِّ صلى الله عليه وسلم " أَصْدَقُ الرُّؤْيَا بِالأَسْحَارِ "
"The most truthful of dreams are in the last hours of the night."
Grade: Da'if (Darussalam)