Ibn ‘Umar said that some of the Prophet’s companions had a dream that lailat al-qadr was among the last seven nights, so God’s messenger said, “ I see that your dreams agree regarding the last seven nights, so if anyone seeks it he should do so during the last seven nights.” (Bukhari and Muslim.)
Hadith Referenceمشكوة المصابيح / كتاب الصوم / 2084
Hadith Gradingالألبانی:مُتَّفق عَلَيْهِ | زبیر علی زئی:متفق عليه
Hadith Takhrij´تحقيق و تخريج: محدث العصر حافظ زبير على زئي رحمه الله` «متفق عليه، رواه البخاري (2015) و مسلم (205 /1165)»