Jami' at-Tirmidhi
Jami` at-Tirmidhi 2274
Allah's Saying "For Them Are Glad Tidings In The Life Of The Present World."
Arabic hadith text
حَدَّثَنَا قُتَيْبَةُ، حَدَّثَنَا ابْنُ لَهِيعَةَ، عَنْ دَرَّاجٍ، عَنْ أَبِي الْهَيْثَمِ، عَنْ أَبِي سَعِيدٍ، عَنِ النَّبِيِّ صلى الله عليه وسلم " أَصْدَقُ الرُّؤْيَا بِالأَسْحَارِ "
Translation
'Abu Sa'eed narrated that the Prophet (s.a.w) said
"The most truthful of dreams are in the last hours of the night."