Hadith 32:15
Abu Hurayra reported that the Messenger of Allah, may Allah bless him and grant him peace, said, "Our Lord, the Blessed and Exalted, descends to the lowest heaven every night when a third of the night remains. He says, 'Who is calling on Me so that I can answer him? Who is asking Me for something so that I can give to him? "Who is asking Me for forgiveness so that I can forgive him?'"
حَدَّثَنَا إِسْمَاعِيلُ قَالَ: حَدَّثَنِي مَالِكٌ، عَنِ ابْنِ شِهَابٍ، عَنْ أَبِي عَبْدِ اللهِ الأَغَرِّ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللهِ صلى الله عليه وسلم قَالَ: يَنْزِلُ رَبُّنَا تَبَارَكَ وَتَعَالَى فِي كُلِّ لَيْلَةٍ إِلَى السَّمَاءِ الدُّنْيَا، حِينَ يَبْقَى ثُلُثُ اللَّيْلِ الْآخَرُ، فَيَقُولُ: مَنْ يَدْعُونِي فَأَسْتَجِيبَ لَهُ؟ مَنْ يَسْأَلُنِي فَأُعْطِيَهُ؟ مَنْ يَسْتَغْفِرُنِي فَأَغْفِرَ لَهُ؟
Original Reference: Al-Adab Al-Mufrad 753