(3) باب تَحَرِّي لَيْلَةِ الْقَدْرِ فِي الْوِتْرِ مِنَ الْعَشْرِ الأَوَاخِرِ
Narrated Ibn `Abbas:
Allah's Messenger (ﷺ) said, "The Night of Qadr is in the last ten nights of the month (Ramadan), either on the first nine or in the last (remaining) seven nights (of Ramadan)." Ibn `Abbas added, "Search for it on the twenty-fourth (of Ramadan).
Reference: Sahih al-Bukhari 2022
In-book reference: Book 32, Hadith 9
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 3, Book 32, Hadith 239