(40) باب فَضْلِ لَيْلَةِ الْقَدْرِ وَالْحَثِّ عَلَى طَلَبِهَا وَبَيَانِ مَحَلِّهَا وَأَرْجَى أَوْقَاتِ طَلَبِهَا
Ibn 'Umar (Allah be pleased with them) reported Allah's Apostle (ﷺ) as saying:
Seek Lailat-ul-Qadr in the last week (of Ramadan). (ID)
Reference (ID): Sahih Muslim 1165 b (ID)
In-book reference (ID): Book 13, Hadith 268 (ID)
USC-MSA web (English) reference(deprecated numbering scheme): Book 6, Hadith 2618 (ID)