From Saheeh al Bukhari:
Narrated Abu Huraira:
The Prophet said, “Whoever fasted the month of Ramadan out of sincere Faith (i.e. belief) and hoping for a reward from Allah, then all his past sins will be forgiven, and whoever stood for the prayers in the night of Qadr out of sincere Faith and hoping for a reward from Allah, then all his previous sins will be forgiven .”
Narrated Abu Said Al-Khudri:
The Prophet said: “I was informed (of the date) of the Night (of Qadr) but I have been caused to forget it. (In the dream) I saw myself prostrating in mud and water in the morning of that night. So, look for it in the last ten nights and in the odd ones of them.”
May Allaah grant us all the ability to stand a pray the night of Qadr. Taqabbal Allaah minna wa minkum, ameen.