English translation
[1786] 180 - (...) It was narrated that Ubayy bin Ka'b said: "Ubayy said concerning Lailat Al-Qadr: 'By Allâh I know when it is, and I am certain it is the night that the Messenger of Allâh ﷺ commanded us to spend in prayer; it is the night of the twenty-seventh.'"
