question #1 Sahih Muslim 758b, Book 6, Hadith 202 : What is the significance of the last third of the night in Islamic worship and supplication?

Allah descends every night to the lowest heaven when one-third of the first part of the night is over and says: I am the Lord; I am the Lord: who is there to supplicate Me so that I answer him? Who is there to beg of Me so that I grant him? Who is there to beg forgiveness from Me so that I forgive him? He continues like this till the day breaks.