Sahih Bukhari 2015

Narrated Abu Salama: I asked Abu Sa`id, and he was a friend of mine, (about the Night of Qadr) and he said, We practiced I`tikaf (seclusion in the mosque) in the middle third of the month of Ramadan with the Prophet . In the morning of the 20th..

Narrated `Aisha: Allah's Apostle said, Search for the Night of Qadr in the odd nights of the last ten days of Ramadan. ..

Narrated Abu Sa`id Al-Khudri: Allah's Apostle used to practice I`tikaf (in the mosque) in the middle third of Ramadan and after passing the twenty nights he used to go back to his house on the 21st, and the people who were in I`tikaf with him also..

Narrated `Aisha: The Prophet said, Look for (the Night of Qadr). ..

Narrated `Aisha: Allah's Apostle used to practice I`tikaf in the last ten nights of Ramadan and used to say, Look for the Night of Qadr in the last ten nights of the month of Ramadan. ..

Narrated Ibn `Abbas: The Prophet said, Look for the Night of Qadr in the last ten nights of Ramadan ,' on the night when nine or seven or five nights remain out of the last ten nights of Ramadan (i.e. 21, 23, 25, respectively). ..