Sahih Bukhari | Volume 3 | Hadith Number 240

Narrated by 'Ubada bin As-Samit
The Prophet came out to inform us about the Night of Qadr but two Muslims were quarrelling with each other. So, the Prophet said, "I came out to inform you about the Night of Qadr but such-and-such persons were quarrelling, so the news about it had been taken away; yet that might be for your own good, so search for it on the 29th, 27th and 25th (of Ramadan).