are you talking about tahajjud brother ?
Bukhari :: Book 2 :: Volume 21 :: Hadith 246
Narrated Abu Huraira:
Allah's Apostle (p.b.u.h) said, "Our Lord, the Blessed, the Superior, comes every night down on the nearest Heaven to us when the last third of the night remains, saying: "Is there anyone to invoke Me, so that I may respond to invocation? Is there anyone to ask Me, so that I may grant him his request? Is there anyone seeking My forgiveness, so that I may forgive him?"
so this is the best time when our dua can be accepted by allah swt
