The Messenger of Allah ﷺ as saying: Our Lord who is blessed and exalted descends every night to the lowest heaven when the last one-third of the night remains, and says: Who supplicated Me so that I may answer him ? Who asks of Me so that I may give to him ? Who asks My forgiveness so that I may forgive him ? (Using translation from Abū Dāʾūd 1315)
أَنَّ رَسُولَ اللهِ ﷺ قَالَ يَنْزِلُ رَبُّنَا تَبَارَكَ اسْمُهُ كُلَّ لَيْلَةٍ حِينَ يَبْقَى ثُلُثُ اللَّيْلِ الْآخِرِ فَيَقُولُ مَنْ يَدْعُونِي فَأَسْتَجِيبَ لَهُ مَنْ يَسْتَغْفِرُنِي فَأَغْفِرَ لَهُ مَنْ يَسْأَلُنِي فَأُعْطِيَهِ