Hadithcore
Mishkat al-Masabih, 1471

Abu Huraira reported God's Messenger as saying, "There are no days on which God likes better to be worshipped than the ten days of Dhul Hijja. Fasting observed on each of these days is equivalent to a year’s fasting, and prayer during each of these nights is equivalent to prayer during <i>Lailat al-qadr</i>.’* * A night towards the end of Ramadan. See Book 7, Chap. 9. Tirmidhi and Ibn Majah transmitted it, but Tirmidhi said its <i>isnad</i> is weak.

وَعَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «مَا مِنْ أَيَّامٍ أَحَبُّ إِلَى اللَّهِ أَنْ يُتَعَبَّدَ لَهُ فِيهَا مِنْ عَشْرِ ذِي الْحِجَّةِ يَعْدِلُ صِيَامُ كُلِّ يَوْمٍ مِنْهَا بِصِيَامِ سَنَةٍ وَقِيَامُ كُلِّ لَيْلَةٍ مِنْهَا بِقِيَامِ لَيْلَةِ الْقَدْرِ» . رَوَاهُ التِّرْمِذِيُّ وَابْنُ مَاجَهْ وَقَالَ التِّرْمِذِيُّ إِسْنَادُهُ ضَعِيف

References1 variant
In-Book Reference
Book 4, Hadith 872