Sahih Muslim 1170
Sahih Muslim · Book 13: The Book of Fasting · The virtue of Lailat Al-Qadr and the Exhortation to seek it; When it is and the most likely times to seek it
Abu Huraira (Allah be pleased with him) reported:
وَحَدَّثَنَا مُحَمَّدُ بْنُ عَبَّادٍ ، وَابْنُ أَبِي عُمَرَ ، قَالاَ حَدَّثَنَا مَرْوَانُ، - وَهُوَ الْفَزَارِيُّ - عَنْ يَزِيدَ، - وَهُوَ ابْنُ كَيْسَانَ - عَنْ أَبِي حَازِمٍ ، عَنْ أَبِي هُرَيْرَةَ ، - رضى الله عنه - قَالَ تَذَاكَرْنَا لَيْلَةَ الْقَدْرِ عِنْدَ رَسُولِ اللَّهِ صلى الله عليه وسلم فَقَالَ " أَيُّكُمْ يَذْكُرُ حِينَ طَلَعَ الْقَمَرُ وَهُوَ مِثْلُ شِقِّ جَفْنَةٍ " .
We were talking about Lailat-ul-Qadr in the presence of the Messenger of Allah (ﷺ) and he said: He who amongst you remembers (the night) when the moon arose and it was like a piece of plate (at the fag end of the month in a state of waning).