Rat Ka Aakhri Hissa

Sayyiduna Amr ibne Abasah (RadhiAllaho anho) narrates
that Rasulullah (Sallallahu Alaihi Wasallam) told me:

Indeed, the closest the Rabb comes to His slave,
is in the last part of the night;
If you can remember Allah Subhanahu wa ta'ala
at that time, then do so.

{ Mustadrak Hakim }