Musannaf Ibn Abi Shayba 3:6305

'Abd al-Wahhab al-Thaqafi narrated to us, from Humayd, from Anas, from 'Ubadah ibn al-Samit, who said: The Messenger of Allah (may Allah bless him and grant him peace) came out to us, intending to inform us about the Night of Decree (Laylat al-Qadr). Two men argued, so he said: "I came out intending to inform you about the Night of Decree, but such-and-such and such-and-such argued, and perhaps that is better. Seek it in the ninth, the seventh, and the fifth."