ENOfficial
Abu Huraira reported Allah's Messenger (ﷺ) as saying: He who prayed on the Lailat-ul-Qadr (the Majestic Night) knowing that it is (the same night). I (believe) that he (the Prophet (ﷺ) also) said: (He who does) it with faith and seeking reward (from Allah), his sins would be forgiven.
Source: sunnah.com
Other translations
Arabic
حَدَّثَنِي مُحَمَّدُ بْنُ رَافِعٍ، حَدَّثَنَا شَبَابَةُ، حَدَّثَنِي وَرْقَاءُ، عَنْ أَبِي الزِّنَادِ، عَنِ الأَعْرَجِ، عَنْ أَبِي هُرَيْرَةَ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " مَنْ يَقُمْ لَيْلَةَ الْقَدْرِ فَيُوَافِقُهَا - أُرَاهُ قَالَ - إِيمَانًا وَاحْتِسَابًا غُفِرَ لَهُ " .
sunnah.com