Seek the time of Lailat-ul-Qadr in the last (ten nights), or he said: in the last nine (nights).
Sahih Muslim Book 13, Hadith 273
← Previous Hadith He who is anxious to seek it (Lailat-ul-Qadr) should seek it in the last ten (nights of Ramadan).

Sahih Muslim Book 13, Hadith 272 Next Hadith → I was shown Lailat-ul-Qadr; then some members of my family awoke me up, then I was caused to forget it. So seek it in the last week. Harmala said: (The Prophet did not say:" I was made to forget," but he stated):" But I forgot it."

Sahih Muslim Book 13, Hadith 274