The Prophet (ﷺ) as saying: Lailat al-qadr is the twenty-seventh night (of Ramadan)
Sunan Abi Dawud Book 6, Hadith 16
← Previous Hadith The Messenger of Allah (ﷺ) as saying: Seek lailat al-qadr in the last seven days.

Sunan Abi Dawud Book 6, Hadith 15 Next Hadith → The Messenger of Allah (ﷺ) was asked about lailat al-qadr and I was hearing: He said: It is during the whole of Ramadan.

Abu Dawud said: Sufyan and Shu'bah narrated this tradition from Abu Ishaq as a statement of Ibn 'Umar himself, they did not transmit it as a saying of the Prophet (ﷺ)

Sunan Abi Dawud Book 6, Hadith 17